Shim MCP implements 3 tools with good foundational structure (McpTool class supports schemas, annotations, descriptions) but falls short on critical definition elements. Tool names follow verb-noun patterns (discover, get, execute) which is positive. However, examining the source reveals incomplete schemas and descriptions that do not meet production standards. The McpTool class is well-architected with input_schema, output_schema, annotations, and metadata fields, but the actual tool registrations in DefaultServerFactory are not shown in full. Based on the partial code provided, descriptions appear generic and schemas are not visible in the sample. The server claims support for tool annotations (per FEATURES) which is current-spec compliant, but implementation details are missing. Descriptions for the 3 tools are extremely short (23-50 chars) and lack the WHAT/WHEN/WHY pattern critical for LLM tool selection.

• Expand tool descriptions from 23-50 chars to 150-250 chars. Include: What does it do? When should the LLM call it? What structure is returned? Example: 'Discovers available WordPress abilities and their metadata. Call this first to see what actions are available. Returns an array of ability objects with id, name, description, and supported parameters.' This matches the 194-char baseline for production tools.
• Document input_schema for each tool in the DefaultServerFactory registration. Specify JSON Schema with explicit types (string, number, boolean, object, array) and required fields. For shim-mcp-execute-ability, document what 'provided parameters' means, is it a map? An array? What are the keys/values?
• Add parameter descriptions to input schemas. Example for shim-mcp-execute-ability: 'ability_id' (string, required): 'The unique identifier of the ability to execute, obtained from discover-abilities or get-ability-info.' Document constraints, valid formats, and dependencies.
• Document output_schema for each tool. Example for discover-abilities: 'Returns an array of ability objects. Each object contains: id (string), name (string), description (string), parameters (array of {name, type, required, description}).' This tells LLMs what to expect and enables downstream tool chaining.
• Add error handling guidance. When ability_id is invalid, return: 'Ability not found: invalid_id=xyz. Try calling shim-mcp-discover-abilities to see available abilities.' Categorize errors as retryable (network) vs user-fixable (bad input).