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fix: chain exceptions in get_prompt and read_resource handlers #2542

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fix: chain exceptions in get_prompt and read_resource handlers #2542

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6 changes: 3 additions & 3 deletions src/mcp/server/mcpserver/server.py
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Original file line number Diff line number Diff line change
Expand Up @@ -447,8 +447,8 @@ async def read_resource(
context = Context(mcp_server=self)
try:
resource = await self._resource_manager.get_resource(uri, context)
except ValueError:
raise ResourceError(f"Unknown resource: {uri}")
except ValueError as exc:
raise ResourceError(f"Unknown resource: {uri}") from exc

try:
content = await resource.read()
Expand Down Expand Up @@ -1109,4 +1109,4 @@ async def get_prompt(
)
except Exception as e:
logger.exception(f"Error getting prompt {name}")
raise ValueError(str(e))
raise ValueError(str(e)) from e
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