flask-mcp-plus has critically inadequate tool definitions. Only 2 tools are defined: 'hello_world' and 'add'. Both have minimal descriptions ('hello world' and 'add' respectively, totaling 5 and 3 characters, far below the 10-character minimum baseline of 34 chars p10). Tool naming is not action-oriented (hello_world lacks clarity on what it does; 'add' is a math operation with no context on when to use it). Schemas are present but sparse, the 'add' tool correctly declares integer parameters a and b as required, but lacks descriptions for these parameters. The 'hello_world' tool has an empty parameter schema with no description of what it returns. No error handling, no output documentation, and no recovery guidance are visible. The codebase shows HTTP transport via Flask, which is acceptable, but the actual tool definitions are severely underdeveloped for production use. Framework is 'custom' (hand-rolled Flask integration), not a mature MCP SDK.

• Rewrite tool descriptions as explicit, 50-200 character narratives. For 'hello_world': 'Returns a greeting message. Use this to test server connectivity and confirm the MCP endpoint is responding.' For 'add': 'Computes the sum of two integers. Returns an integer result. Use for arithmetic calculations in multi-step workflows.'
• Rename 'hello_world' to 'ping_server' or 'get_greeting' to signal the action clearly.
• Add parameter descriptions for 'add': a: 'First integer to add (range: -999999 to 999999)', b: 'Second integer to add (range: -999999 to 999999)'.
• Document output schemas explicitly. For 'add': { 'type': 'object', 'properties': { 'result': { 'type': 'integer', 'description': 'The sum of a and b' }, 'inputs': { 'type': 'object', 'properties': { 'a': {'type': 'integer'}, 'b': {'type': 'integer'} } } } }
• Add error handling: validate that inputs are integers, return 'Invalid input: a and b must be integers' with guidance to retry with valid types.
• Expand the toolkit beyond toy examples. Add realistic domain tools (e.g., if Flask-based: read_template, render_html, post_to_route) to demonstrate practical MCP composition patterns.