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Add icons support for ResourceTemplate (#1412)
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Peter Alexander 2025-10-01 13:23:46 +01:00 • committed by GitHub
commit 3e798bfc01
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1 changed files with 28 additions and 2 deletions
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6
src/mcp/server/fastmcp/resources/templates.py
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@ -12,6 +12,7 @@ from pydantic import BaseModel, Field, validate_call
from mcp.server.fastmcp.resources.types import FunctionResource, Resource
from mcp.server.fastmcp.utilities.context_injection import find_context_parameter, inject_context
from mcp.server.fastmcp.utilities.func_metadata import func_metadata
from mcp.types import Icon
if TYPE_CHECKING:
from mcp.server.fastmcp.server import Context
@ -27,6 +28,7 @@ class ResourceTemplate(BaseModel):
title: str | None = Field(description="Human-readable title of the resource", default=None)
description: str | None = Field(description="Description of what the resource does")
mime_type: str = Field(default="text/plain", description="MIME type of the resource content")
icons: list[Icon] | None = Field(default=None, description="Optional list of icons for the resource template")
fn: Callable[..., Any] = Field(exclude=True)
parameters: dict[str, Any] = Field(description="JSON schema for function parameters")
context_kwarg: str | None = Field(None, description="Name of the kwarg that should receive context")
@ -40,6 +42,7 @@ class ResourceTemplate(BaseModel):
title: str | None = None,
description: str | None = None,
mime_type: str | None = None,
icons: list[Icon] | None = None,
context_kwarg: str | None = None,
) -> ResourceTemplate:
"""Create a template from a function."""
@ -67,6 +70,7 @@ class ResourceTemplate(BaseModel):
title=title,
description=description or fn.__doc__ or "",
mime_type=mime_type or "text/plain",
icons=icons,
fn=fn,
parameters=parameters,
context_kwarg=context_kwarg,
@ -103,7 +107,7 @@ class ResourceTemplate(BaseModel):
title=self.title,
description=self.description,
mime_type=self.mime_type,
icons=None, # Resource templates don't support icons
icons=self.icons,
fn=lambda: result, # Capture result in closure
)
except Exception as e: