Fix for Url Elicitation issue 1768 (#1780)

src/mcp/server/fastmcp/tools/base.py

@@ -11,6 +11,7 @@ from pydantic import BaseModel, Field
 from mcp.server.fastmcp.exceptions import ToolError
 from mcp.server.fastmcp.utilities.context_injection import find_context_parameter
 from mcp.server.fastmcp.utilities.func_metadata import FuncMetadata, func_metadata
+from mcp.shared.exceptions import UrlElicitationRequiredError
 from mcp.shared.tool_name_validation import validate_and_warn_tool_name
 from mcp.types import Icon, ToolAnnotations
 
@@ -108,6 +109,10 @@ class Tool(BaseModel):
                 result = self.fn_metadata.convert_result(result)
 
             return result
+        except UrlElicitationRequiredError:
+            # Re-raise UrlElicitationRequiredError so it can be properly handled
+            # as an MCP error response with code -32042
+            raise
         except Exception as e:
             raise ToolError(f"Error executing tool {self.name}: {e}") from e