The LinkedIn Agent MCP server presents a critical gap between declared tools and visible implementation. The repository claims to offer 12 tool registration functions (person, company, job, people, post, saved_job, profile, recommendation, engagement, messaging, network, feed tools) but only ONE tool is actually visible in the provided source code: 'close_session'. The source code shows tool registrations being called but does not include the actual tool definitions, making it impossible to evaluate schemas, parameter descriptions, or output structures for 11 of the 12 claimed tools. The single visible tool 'close_session' has a minimal implementation with no input schema, no parameter descriptions, and only a basic text description. Per the hard scoring rules: tools without visible definitions are inferred only, capping their score at 50; tools with no input schema score 0 for schema; tools with trivial descriptions score low. This server fails the core requirement that tool definitions must be verifiable in source code.

• Provide source code for all 12 tool registration functions (person_tools, company_tools, etc.). Current submission only shows registration calls, not implementations. Include the actual @mcp.tool() decorated functions with full schemas and descriptions.
• For close_session: add explicit output schema documentation. Example: 'Returns {status: "success"|"error", message: string, timestamp: ISO8601 string}'. This lets LLMs parse the response.
• For close_session: enhance description with state-change declaration and recovery guidance. Example: 'Closes the current browser session, terminating all active connections and freeing memory. This is idempotent and safe to retry. If the session is already closed, returns success.'
• For all tools: add parameter descriptions even if empty. For close_session: add 'Input: No parameters required' as explicit schema documentation.
• Categorize close_session error as 'retryable' or 'fatal' in the response. Example: {status: "error", message: "...", errorClass: "retryable", suggestion: "Retry in 5 seconds or call list_sessions() to verify state"}.
• Add output field tracing. If close_session is often called before create_session, ensure create_session can work without prior state (idempotency). Document this dependency.
• Review the 54 Agentic Tool Patterns (arcade.dev/patterns) and apply naming conventions (verb_noun), parameter constraints (enums for constrained inputs), and output schemas (paginated-result for list tools) to all 12 tool families.
• Add tool annotations (if supported by fastmcp 2.14+): mark close_session with destructiveHint=false (it cleans up, not destructive to data) or idempotentHint=true if safe to retry.