diff --git a/reference/python/uv.lock b/reference/python/uv.lock
index c652ef206..1fb390024 100644
--- a/reference/python/uv.lock
+++ b/reference/python/uv.lock
@@ -759,7 +759,7 @@ wheels = [
 [[package]]
 name = "deepagents"
 version = "0.3.1"
-source = { git = "https://github.com/langchain-ai/deepagents.git?subdirectory=libs%2Fdeepagents#ba95dab709c3ca4283655e121ae5544edf480f3b" }
+source = { git = "https://github.com/langchain-ai/deepagents.git?subdirectory=libs%2Fdeepagents#bed960cc93c96d2c32093016bb66c445eedb6053" }
 dependencies = [
     { name = "langchain", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langchain-anthropic", marker = "platform_python_implementation != 'PyPy'" },
@@ -1803,7 +1803,7 @@ wheels = [
 [[package]]
 name = "langchain"
 version = "1.2.0"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Flangchain_v1#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Flangchain_v1#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langgraph", marker = "platform_python_implementation != 'PyPy'" },
@@ -1813,7 +1813,7 @@ dependencies = [
 [[package]]
 name = "langchain-anthropic"
 version = "1.3.1"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fanthropic#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fanthropic#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "anthropic", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
@@ -1832,8 +1832,8 @@ dependencies = [
 
 [[package]]
 name = "langchain-aws"
-version = "1.1.1"
-source = { git = "https://github.com/langchain-ai/langchain-aws.git?subdirectory=libs%2Faws#d369dbb84a49d81e2dea282452c1e251b3b530a8" }
+version = "1.2.0"
+source = { git = "https://github.com/langchain-ai/langchain-aws.git?subdirectory=libs%2Faws#0acbad4f2970fbdf30cb6f2545532049e4c3d3fd" }
 dependencies = [
     { name = "boto3", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
@@ -1897,7 +1897,7 @@ dependencies = [
 [[package]]
 name = "langchain-chroma"
 version = "1.1.0"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fchroma#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fchroma#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "chromadb", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
@@ -1907,7 +1907,7 @@ dependencies = [
 [[package]]
 name = "langchain-classic"
 version = "1.0.1"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Flangchain#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Flangchain#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langchain-text-splitters", marker = "platform_python_implementation != 'PyPy'" },
@@ -1951,7 +1951,7 @@ dependencies = [
 [[package]]
 name = "langchain-core"
 version = "1.2.5"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fcore#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fcore#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "jsonpatch", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langsmith", marker = "platform_python_implementation != 'PyPy'" },
@@ -1976,7 +1976,7 @@ dependencies = [
 [[package]]
 name = "langchain-deepseek"
 version = "1.1.0"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fdeepseek#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fdeepseek#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langchain-openai", marker = "platform_python_implementation != 'PyPy'" },
@@ -1994,7 +1994,7 @@ dependencies = [
 [[package]]
 name = "langchain-exa"
 version = "1.0.0"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fexa#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fexa#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "exa-py", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
@@ -2003,7 +2003,7 @@ dependencies = [
 [[package]]
 name = "langchain-fireworks"
 version = "1.1.0"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Ffireworks#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Ffireworks#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "aiohttp", marker = "platform_python_implementation != 'PyPy'" },
     { name = "fireworks-ai", marker = "platform_python_implementation != 'PyPy'" },
@@ -2015,7 +2015,7 @@ dependencies = [
 [[package]]
 name = "langchain-google-community"
 version = "3.0.2"
-source = { git = "https://github.com/langchain-ai/langchain-google.git?subdirectory=libs%2Fcommunity#cb74e0da6728f320b964ea62897149e595eeed3f" }
+source = { git = "https://github.com/langchain-ai/langchain-google.git?subdirectory=libs%2Fcommunity#dd9dadf2507610306bfd3048281c28d900c0878f" }
 dependencies = [
     { name = "google-api-core", marker = "platform_python_implementation != 'PyPy'" },
     { name = "google-api-python-client", marker = "platform_python_implementation != 'PyPy'" },
@@ -2029,7 +2029,7 @@ dependencies = [
 [[package]]
 name = "langchain-google-genai"
 version = "4.1.2"
-source = { git = "https://github.com/langchain-ai/langchain-google.git?subdirectory=libs%2Fgenai#cb74e0da6728f320b964ea62897149e595eeed3f" }
+source = { git = "https://github.com/langchain-ai/langchain-google.git?subdirectory=libs%2Fgenai#dd9dadf2507610306bfd3048281c28d900c0878f" }
 dependencies = [
     { name = "filetype", marker = "platform_python_implementation != 'PyPy'" },
     { name = "google-genai", marker = "platform_python_implementation != 'PyPy'" },
@@ -2040,7 +2040,7 @@ dependencies = [
 [[package]]
 name = "langchain-google-vertexai"
 version = "3.2.0"
-source = { git = "https://github.com/langchain-ai/langchain-google.git?subdirectory=libs%2Fvertexai#cb74e0da6728f320b964ea62897149e595eeed3f" }
+source = { git = "https://github.com/langchain-ai/langchain-google.git?subdirectory=libs%2Fvertexai#dd9dadf2507610306bfd3048281c28d900c0878f" }
 dependencies = [
     { name = "bottleneck", marker = "platform_python_implementation != 'PyPy'" },
     { name = "google-cloud-aiplatform", marker = "platform_python_implementation != 'PyPy'" },
@@ -2057,7 +2057,7 @@ dependencies = [
 [[package]]
 name = "langchain-groq"
 version = "1.1.1"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fgroq#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fgroq#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "groq", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
@@ -2066,7 +2066,7 @@ dependencies = [
 [[package]]
 name = "langchain-huggingface"
 version = "1.2.0"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fhuggingface#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fhuggingface#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "huggingface-hub", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
@@ -2104,7 +2104,7 @@ dependencies = [
 [[package]]
 name = "langchain-mistralai"
 version = "1.1.1"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fmistralai#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fmistralai#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "httpx", marker = "platform_python_implementation != 'PyPy'" },
     { name = "httpx-sse", marker = "platform_python_implementation != 'PyPy'" },
@@ -2127,7 +2127,7 @@ dependencies = [
 [[package]]
 name = "langchain-nomic"
 version = "1.0.1"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fnomic#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fnomic#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
     { name = "nomic", marker = "platform_python_implementation != 'PyPy'" },
@@ -2147,7 +2147,7 @@ dependencies = [
 [[package]]
 name = "langchain-ollama"
 version = "1.0.1"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Follama#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Follama#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
     { name = "ollama", marker = "platform_python_implementation != 'PyPy'" },
@@ -2156,7 +2156,7 @@ dependencies = [
 [[package]]
 name = "langchain-openai"
 version = "1.1.6"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fopenai#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fopenai#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
     { name = "openai", marker = "platform_python_implementation != 'PyPy'" },
@@ -2178,7 +2178,7 @@ dependencies = [
 [[package]]
 name = "langchain-perplexity"
 version = "1.1.0"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fperplexity#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fperplexity#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
     { name = "perplexityai", marker = "platform_python_implementation != 'PyPy'" },
@@ -2201,7 +2201,7 @@ dependencies = [
 [[package]]
 name = "langchain-prompty"
 version = "1.0.0"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fprompty#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fprompty#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
     { name = "pyyaml", marker = "platform_python_implementation != 'PyPy'" },
@@ -2210,7 +2210,7 @@ dependencies = [
 [[package]]
 name = "langchain-qdrant"
 version = "1.1.0"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fqdrant#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fqdrant#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
     { name = "pydantic", marker = "platform_python_implementation != 'PyPy'" },
@@ -2389,8 +2389,8 @@ requires-dist = [
 
 [[package]]
 name = "langchain-tavily"
-version = "0.2.15"
-source = { git = "https://github.com/tavily-ai/langchain-tavily.git#880ab23870120eeffe7064a906ab3b8d08e91d0f" }
+version = "0.2.16"
+source = { git = "https://github.com/tavily-ai/langchain-tavily.git#23da3944a23348e5cad68f22c5a038f481ce745d" }
 dependencies = [
     { name = "aiohttp", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langchain", marker = "platform_python_implementation != 'PyPy'" },
@@ -2401,7 +2401,7 @@ dependencies = [
 [[package]]
 name = "langchain-tests"
 version = "1.1.2"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fstandard-tests#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fstandard-tests#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "httpx", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
@@ -2419,7 +2419,7 @@ dependencies = [
 [[package]]
 name = "langchain-text-splitters"
 version = "1.1.0"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Ftext-splitters#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Ftext-splitters#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
 ]
@@ -2458,8 +2458,8 @@ dependencies = [
 
 [[package]]
 name = "langchain-xai"
-version = "1.1.0"
-source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fxai#03ae39747b96486c7a8c77e62f456a444ecd83a6" }
+version = "1.2.0"
+source = { git = "https://github.com/langchain-ai/langchain.git?subdirectory=libs%2Fpartners%2Fxai#a7aad60989581d80283ed2a13e19b41706daaec3" }
 dependencies = [
     { name = "aiohttp", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
@@ -2470,7 +2470,7 @@ dependencies = [
 [[package]]
 name = "langgraph"
 version = "1.0.5"
-source = { git = "https://github.com/langchain-ai/langgraph?subdirectory=libs%2Flanggraph#eec823cbd6deace32825ac21f7488ca631ba6c47" }
+source = { git = "https://github.com/langchain-ai/langgraph?subdirectory=libs%2Flanggraph#0acd5decf82751cf6f97d1bec8b30188ce316ff6" }
 dependencies = [
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langgraph-checkpoint", marker = "platform_python_implementation != 'PyPy'" },
@@ -2483,7 +2483,7 @@ dependencies = [
 [[package]]
 name = "langgraph-checkpoint"
 version = "3.0.1"
-source = { git = "https://github.com/langchain-ai/langgraph?subdirectory=libs%2Fcheckpoint#eec823cbd6deace32825ac21f7488ca631ba6c47" }
+source = { git = "https://github.com/langchain-ai/langgraph?subdirectory=libs%2Fcheckpoint#0acd5decf82751cf6f97d1bec8b30188ce316ff6" }
 dependencies = [
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
     { name = "ormsgpack", marker = "platform_python_implementation != 'PyPy'" },
@@ -2492,7 +2492,7 @@ dependencies = [
 [[package]]
 name = "langgraph-checkpoint-aws"
 version = "1.0.2"
-source = { git = "https://github.com/langchain-ai/langchain-aws.git?subdirectory=libs%2Flanggraph-checkpoint-aws#d369dbb84a49d81e2dea282452c1e251b3b530a8" }
+source = { git = "https://github.com/langchain-ai/langchain-aws.git?subdirectory=libs%2Flanggraph-checkpoint-aws#0acbad4f2970fbdf30cb6f2545532049e4c3d3fd" }
 dependencies = [
     { name = "boto3", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langgraph", marker = "platform_python_implementation != 'PyPy'" },
@@ -2502,7 +2502,7 @@ dependencies = [
 [[package]]
 name = "langgraph-checkpoint-postgres"
 version = "3.0.2"
-source = { git = "https://github.com/langchain-ai/langgraph?subdirectory=libs%2Fcheckpoint-postgres#eec823cbd6deace32825ac21f7488ca631ba6c47" }
+source = { git = "https://github.com/langchain-ai/langgraph?subdirectory=libs%2Fcheckpoint-postgres#0acd5decf82751cf6f97d1bec8b30188ce316ff6" }
 dependencies = [
     { name = "langgraph-checkpoint", marker = "platform_python_implementation != 'PyPy'" },
     { name = "orjson", marker = "platform_python_implementation != 'PyPy'" },
@@ -2513,7 +2513,7 @@ dependencies = [
 [[package]]
 name = "langgraph-checkpoint-sqlite"
 version = "3.0.1"
-source = { git = "https://github.com/langchain-ai/langgraph?subdirectory=libs%2Fcheckpoint-sqlite#eec823cbd6deace32825ac21f7488ca631ba6c47" }
+source = { git = "https://github.com/langchain-ai/langgraph?subdirectory=libs%2Fcheckpoint-sqlite#0acd5decf82751cf6f97d1bec8b30188ce316ff6" }
 dependencies = [
     { name = "aiosqlite", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langgraph-checkpoint", marker = "platform_python_implementation != 'PyPy'" },
@@ -2523,7 +2523,7 @@ dependencies = [
 [[package]]
 name = "langgraph-prebuilt"
 version = "1.0.5"
-source = { git = "https://github.com/langchain-ai/langgraph?subdirectory=libs%2Fprebuilt#eec823cbd6deace32825ac21f7488ca631ba6c47" }
+source = { git = "https://github.com/langchain-ai/langgraph?subdirectory=libs%2Fprebuilt#0acd5decf82751cf6f97d1bec8b30188ce316ff6" }
 dependencies = [
     { name = "langchain-core", marker = "platform_python_implementation != 'PyPy'" },
     { name = "langgraph-checkpoint", marker = "platform_python_implementation != 'PyPy'" },
@@ -2532,7 +2532,7 @@ dependencies = [
 [[package]]
 name = "langgraph-sdk"
 version = "0.3.1"
-source = { git = "https://github.com/langchain-ai/langgraph?subdirectory=libs%2Fsdk-py#eec823cbd6deace32825ac21f7488ca631ba6c47" }
+source = { git = "https://github.com/langchain-ai/langgraph?subdirectory=libs%2Fsdk-py#0acd5decf82751cf6f97d1bec8b30188ce316ff6" }
 dependencies = [
     { name = "httpx", marker = "platform_python_implementation != 'PyPy'" },
     { name = "orjson", marker = "platform_python_implementation != 'PyPy'" },
@@ -2559,8 +2559,8 @@ dependencies = [
 
 [[package]]
 name = "langsmith"
-version = "0.5.1"
-source = { git = "https://github.com/langchain-ai/langsmith-sdk.git?subdirectory=python#68d8f4a32a524c39d55587a46e5f3c4f40b0331b" }
+version = "0.5.2"
+source = { git = "https://github.com/langchain-ai/langsmith-sdk.git?subdirectory=python#1482c9c3f689680e448da66e75c377a8f5bb00ae" }
 dependencies = [
     { name = "httpx", marker = "platform_python_implementation != 'PyPy'" },
     { name = "orjson", marker = "platform_python_implementation != 'PyPy'" },
diff --git a/src/oss/langchain/messages.mdx b/src/oss/langchain/messages.mdx
index d6269faad..d32fdd228 100644
--- a/src/oss/langchain/messages.mdx
+++ b/src/oss/langchain/messages.mdx
@@ -668,10 +668,8 @@ human_message = HumanMessage(content_blocks=[
 ```
 
 <Tip>
-
-Specifying `content_blocks` when initializing a message will still populate message
-`content`, but provides a type-safe interface for doing so.
-
+    Specifying `content_blocks` when initializing a message will still populate message
+    `content`, but provides a type-safe interface for doing so.
 </Tip>
 :::
 
@@ -1181,11 +1179,11 @@ Content blocks are represented (either when creating a message or accessing the
                 </ParamField>
 
                 <ParamField body="id" type="string">
-                    Reference ID to an externally stored image (e.g., in a provider's file system or in a bucket).
+                    Unique identifier for this content block (either generated by the provider or by LangChain).
                 </ParamField>
 
                 <ParamField body="mime_type" type="string">
-                    Image [MIME type](https://www.iana.org/assignments/media-types/media-types.xhtml#image) (e.g., `image/jpeg`, `image/png`)
+                    Image [MIME type](https://www.iana.org/assignments/media-types/media-types.xhtml#image) (e.g., `image/jpeg`, `image/png`). Required for base64 data.
                 </ParamField>
             </Accordion>
             <Accordion title="AudioContentBlock" icon="volume-high">
@@ -1204,11 +1202,11 @@ Content blocks are represented (either when creating a message or accessing the
                 </ParamField>
 
                 <ParamField body="id" type="string">
-                    Reference ID to an externally stored audio file (e.g., in a provider's file system or in a bucket).
+                    Unique identifier for this content block (either generated by the provider or by LangChain).
                 </ParamField>
 
                 <ParamField body="mime_type" type="string">
-                    Audio [MIME type](https://www.iana.org/assignments/media-types/media-types.xhtml#audio) (e.g., `audio/mpeg`, `audio/wav`)
+                    Audio [MIME type](https://www.iana.org/assignments/media-types/media-types.xhtml#audio) (e.g., `audio/mpeg`, `audio/wav`). Required for base64 data.
                 </ParamField>
             </Accordion>
             <Accordion title="VideoContentBlock" icon="video">
@@ -1227,11 +1225,11 @@ Content blocks are represented (either when creating a message or accessing the
                 </ParamField>
 
                 <ParamField body="id" type="string">
-                    Reference ID to an externally stored video file (e.g., in a provider's file system or in a bucket).
+                    Unique identifier for this content block (either generated by the provider or by LangChain).
                 </ParamField>
 
                 <ParamField body="mime_type" type="string">
-                    Video [MIME type](https://www.iana.org/assignments/media-types/media-types.xhtml#video) (e.g., `video/mp4`, `video/webm`)
+                    Video [MIME type](https://www.iana.org/assignments/media-types/media-types.xhtml#video) (e.g., `video/mp4`, `video/webm`). Required for base64 data.
                 </ParamField>
             </Accordion>
             <Accordion title="FileContentBlock" icon="file">
@@ -1250,11 +1248,11 @@ Content blocks are represented (either when creating a message or accessing the
                 </ParamField>
 
                 <ParamField body="id" type="string">
-                    Reference ID to an externally stored file (e.g., in a provider's file system or in a bucket).
+                    Unique identifier for this content block (either generated by the provider or by LangChain).
                 </ParamField>
 
                 <ParamField body="mime_type" type="string">
-                    File [MIME type](https://www.iana.org/assignments/media-types/media-types.xhtml) (e.g., `application/pdf`)
+                    File [MIME type](https://www.iana.org/assignments/media-types/media-types.xhtml) (e.g., `application/pdf`). Required for base64 data.
                 </ParamField>
             </Accordion>
             <Accordion title="PlainTextContentBlock" icon="align-left">
@@ -1511,11 +1509,11 @@ Content blocks are represented (either when creating a message or accessing the
                 </ParamField>
 
                 <ParamField body="fileId" type="string">
-                    Reference ID to an externally stored image (e.g., in a provider's file system or in a bucket).
+                    Reference to the image in an external file storage system (e.g., OpenAI or Anthropic's Files API).
                 </ParamField>
 
                 <ParamField body="mimeType" type="string">
-                    Image [MIME type](https://www.iana.org/assignments/media-types/media-types.xhtml#image) (e.g., `image/jpeg`, `image/png`)
+                    Image [MIME type](https://www.iana.org/assignments/media-types/media-types.xhtml#image) (e.g., `image/jpeg`, `image/png`). Required for base64 data.
                 </ParamField>
             </Accordion>
             <Accordion title="ContentBlock.Multimodal.Audio" icon="volume-high">
@@ -1534,11 +1532,11 @@ Content blocks are represented (either when creating a message or accessing the
                 </ParamField>
 
                 <ParamField body="fileId" type="string">
-                    Reference ID to an externally stored audio file (e.g., in a provider's file system or in a bucket).
+                    Reference to the audio file in an external file storage system (e.g., OpenAI or Anthropic's Files API).
                 </ParamField>
 
                 <ParamField body="mimeType" type="string">
-                    Audio [MIME type](https://www.iana.org/assignments/media-types/media-types.xhtml#audio) (e.g., `audio/mpeg`, `audio/wav`)
+                    Audio [MIME type](https://www.iana.org/assignments/media-types/media-types.xhtml#audio) (e.g., `audio/mpeg`, `audio/wav`). Required for base64 data.
                 </ParamField>
             </Accordion>
             <Accordion title="ContentBlock.Multimodal.Video" icon="video">
@@ -1557,11 +1555,11 @@ Content blocks are represented (either when creating a message or accessing the
                 </ParamField>
 
                 <ParamField body="fileId" type="string">
-                    Reference ID to an externally stored video file (e.g., in a provider's file system or in a bucket).
+                    Reference to the video file in an external file storage system (e.g., OpenAI or Anthropic's Files API).
                 </ParamField>
 
                 <ParamField body="mimeType" type="string">
-                    Video [MIME type](https://www.iana.org/assignments/media-types/media-types.xhtml#video) (e.g., `video/mp4`, `video/webm`)
+                    Video [MIME type](https://www.iana.org/assignments/media-types/media-types.xhtml#video) (e.g., `video/mp4`, `video/webm`). Required for base64 data.
                 </ParamField>
             </Accordion>
             <Accordion title="ContentBlock.Multimodal.File" icon="file">
@@ -1580,11 +1578,11 @@ Content blocks are represented (either when creating a message or accessing the
                 </ParamField>
 
                 <ParamField body="fileId" type="string">
-                    Reference ID to an externally stored file (e.g., in a provider's file system or in a bucket).
+                    Reference to the file in an external file storage system (e.g., OpenAI or Anthropic's Files API).
                 </ParamField>
 
                 <ParamField body="mimeType" type="string">
-                    File [MIME type](https://www.iana.org/assignments/media-types/media-types.xhtml) (e.g., `application/pdf`)
+                    File [MIME type](https://www.iana.org/assignments/media-types/media-types.xhtml) (e.g., `application/pdf`). Required for base64 data.
                 </ParamField>
             </Accordion>
             <Accordion title="ContentBlock.Multimodal.PlainText" icon="align-left">