Backport: Support for Resource and ResourceTemplate metadata #1928
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Kludex
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Jan 22, 2026
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Motivation and Context
Backport of #1840 to the v1.x branch.
The current implementations of ChatGPT Apps and MCP Apps rely on Resource metadata. This adds the missing
metafield support to the Python SDK's Resource and ResourceTemplate types.Changes
Adds
meta: dict[str, Any] | Nonefield to:Resource(base class)ResourceTemplateFunctionResource.from_function()ReadResourceContentsFastMCP.resource()decoratorThe metadata propagates through list operations (
list_resources,list_resource_templates) and read responses via the_metaprotocol field.Breaking Changes
No
Cherry-pick of 0da9a07 (PR #1840).