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feat: add resource annotations support to FastMCP (#1468)

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Fenn Bailey 2025-10-14 21:07:37 +11:00 • committed by GitHub
commit cd7253c593
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1 changed files with 185 additions and 5 deletions
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7
src/mcp/server/fastmcp/server.py
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@ -43,7 +43,7 @@ from mcp.server.streamable_http import EventStore
from mcp.server.streamable_http_manager import StreamableHTTPSessionManager
from mcp.server.transport_security import TransportSecuritySettings
from mcp.shared.context import LifespanContextT, RequestContext, RequestT
from mcp.types import AnyFunction, ContentBlock, GetPromptResult, Icon, ToolAnnotations
from mcp.types import Annotations, AnyFunction, ContentBlock, GetPromptResult, Icon, ToolAnnotations
from mcp.types import Prompt as MCPPrompt
from mcp.types import PromptArgument as MCPPromptArgument
from mcp.types import Resource as MCPResource
@ -322,6 +322,7 @@ class FastMCP(Generic[LifespanResultT]):
description=resource.description,
mimeType=resource.mime_type,
icons=resource.icons,
annotations=resource.annotations,
)
for resource in resources
]
@ -336,6 +337,7 @@ class FastMCP(Generic[LifespanResultT]):
description=template.description,
mimeType=template.mime_type,
icons=template.icons,
annotations=template.annotations,
)
for template in templates
]
@ -497,6 +499,7 @@ class FastMCP(Generic[LifespanResultT]):
description: str | None = None,
mime_type: str | None = None,
icons: list[Icon] | None = None,
annotations: Annotations | None = None,
) -> Callable[[AnyFunction], AnyFunction]:
"""Decorator to register a function as a resource.
@ -572,6 +575,7 @@ class FastMCP(Generic[LifespanResultT]):
description=description,
mime_type=mime_type,
icons=icons,
annotations=annotations,
)
else:
# Register as regular resource
@ -583,6 +587,7 @@ class FastMCP(Generic[LifespanResultT]):
description=description,
mime_type=mime_type,
icons=icons,
annotations=annotations,
)
self.add_resource(resource)
return fn