Single tool server with a reasonable action verb name ('get_docs') and an informative docstring. However, critical gaps undermine production readiness: (1) Input parameter descriptions exist but are minimal (~30-40 chars each), falling short of the baseline 72 chars; (2) No output schema documentation, the tool returns either a string or an error, but the response structure is not formally described for LLMs to plan downstream actions; (3) The parameter 'library' accepts one of three known values ('langchain', 'openai', 'llama-index') but is not declared as an enum, relying instead on runtime validation that throws ValueError, this violates the constrained-input pattern and forces LLMs to guess valid options; (4) No error guidance in the tool description, when search_web times out or returns zero results, the tool returns generic strings ('No results found', 'Timeout error') that give agents no recovery path; (5) No explicit output schema in the FastMCP registration, meaning LLMs cannot anticipate the response structure; (6) Tool description is 335 characters, which is within baseline (p90=392) but could be more specific about when/why to use it and what to do with the results.

• Add enum constraint to the 'library' parameter schema: enum=['langchain', 'openai', 'llama-index']. Remove runtime ValueError validation.
• Document the output schema explicitly. Example: 'Returns str containing extracted text from documentation pages. Returns error message (e.g. "No results found") if search yields zero results or times out.'
• Replace example values in descriptions with constraints. Change 'The documentation query (e.g., 'Chroma DB')' to 'Free-form search query for the documentation domain (required; 3-200 characters; searches within the selected library only).'
• Add actionable error guidance to the tool description: 'If no results are found, the query may be too specific or the feature may not be documented. Try a broader query or ask the user for clarification. If a timeout occurs, the service may be temporarily unavailable, retry after a short delay.'
• Add readOnlyHint annotation to the tool definition so clients know it is safe to retry without side effects.
• Improve the tool description to address WHEN to use it: 'Use this tool to search for documentation on a specific library (langchain, openai, or llama-index). Call when the user asks for help with library features, API details, or usage examples. Returns up to 2 top search results merged into plain text.'
• Add bounds and format clarity to 'query' parameter: minimum 1 character, maximum 200 characters, no control characters.