Remove "unconditionally" from conditional description

The current docstrings regarding tool creation read, "unconditionally
creates a structured tool (return type annotation permitting)". If the
return type annotation limits whether or not a structured tool can be
created, then creation of a structured tool is *conditional* upon the
presence of a proper return type annotation. Therefore, these
descriptions should not include the word "unconditionally", as it is
inaccurate and contradictory.

Author: mssalvatore

src/mcp/server/fastmcp/server.py

@@ -360,7 +360,7 @@ def add_tool(
             annotations: Optional ToolAnnotations providing additional tool information
             structured_output: Controls whether the tool's output is structured or unstructured
                 - If None, auto-detects based on the function's return type annotation
-                - If True, unconditionally creates a structured tool (return type annotation permitting)
+                - If True, creates a structured tool (return type annotation permitting)
                 - If False, unconditionally creates an unstructured tool
         """
         self._tool_manager.add_tool(
@@ -393,7 +393,7 @@ def tool(
             annotations: Optional ToolAnnotations providing additional tool information
             structured_output: Controls whether the tool's output is structured or unstructured
                 - If None, auto-detects based on the function's return type annotation
-                - If True, unconditionally creates a structured tool (return type annotation permitting)
+                - If True, creates a structured tool (return type annotation permitting)
                 - If False, unconditionally creates an unstructured tool
 
         Example:

src/mcp/server/fastmcp/utilities/func_metadata.py

@@ -187,7 +187,7 @@ def func_metadata(
             the model.
         structured_output: Controls whether the tool's output is structured or unstructured
             - If None, auto-detects based on the function's return type annotation
-            - If True, unconditionally creates a structured tool (return type annotation permitting)
+            - If True, creates a structured tool (return type annotation permitting)
             - If False, unconditionally creates an unstructured tool
 
         If structured, creates a Pydantic model for the function's result based on its annotation.