Server exposes 5 read-only PM prompt tools with complete input schemas and descriptions. All tools follow verb_noun naming (list_, get_, search_, fill_). Descriptions are present and adequate (100-250 chars), exceeding the 10-char minimum. However, parameter descriptions lack actionable constraints (e.g., no enum for category values despite listing 16 known categories; search_query lacks format guidance). Output schemas are documented in docstrings but not formally declared in tool registration. Error handling is minimal, no recovery guidance or actionable error messages. No tool annotations (readOnlyHint, idempotentHint) despite all being read-only. fill_prompt's 'variables' parameter is typed as 'object' with generic description, missing per-prompt placeholder documentation.

• Add enum constraint to category parameter: ['customer-discovery', 'ideation', 'idea-evaluation', 'market-research', 'competitive-analysis', 'trend-analysis', 'synthetic-users', 'prds', 'metrics', 'prototyping', 'release-notes-generator', 'user-journey-maps', 'architecture-diagrams', 'communications', 'stakeholder-management', 'strategy'].
• For fill_prompt, document the expected placeholder structure. Either: (a) return placeholder schema from get_prompt and reference it in fill_prompt description, or (b) add a get_prompt_placeholders tool that returns {prompt_id, placeholders: {[name]: description}}.
• Add readOnlyHint and idempotentHint annotations to all 5 tools via @mcp.tool(readOnlyHint=True, idempotentHint=True) to signal safety to agents.
• Wrap tool implementations with try-catch blocks that return structured error objects: {error: string, suggestion: string, available_options?: []}. E.g., if prompt_id not found, return 'Prompt not found. Did you mean: [list of close matches]?'
• Formalize output schemas in tool docstrings using a structured format (e.g., 'Returns: {id: string, title: string, phase: string, purpose: string, category: string}') or migrate to a schema registry.