This server has 6 tools with highly uneven quality. Tools 1-3 (bark, get_last_bark, get_description) are demo/trivial with minimal descriptions. Tools 4-6 (register_server, heartbeat, discover_servers) have better structure but lack actionable descriptions. Only tools 4-6 have meaningful input schemas visible in code. Critical issues: (1) No tool descriptions explain WHEN to use each tool or what problem it solves. Descriptions are either missing or generic one-liners. (2) Parameter descriptions are sparse, the 'intensity' enum in bark lacks guidance on what intensity values mean in a dog-barking context. (3) No output schemas documented anywhere. What does bark() return? The code shows {sound, timestamp}, but agents have no schema to parse. (4) No error handling guidance, no tool tells the agent what to do if it fails. (5) Tool names are inconsistent in style: 'bark' vs 'register_server' vs 'get_last_bark'. (6) The registry tools (4-6) mix concerns: register_server also handles metadata and endpoint validation, which could fail silently. Source: doodle_server.py shows async methods but no MCP-layer schema definitions visible; mcp_registry/server.py defines input parameters in function signatures (not JSON Schema), making schemas implicit and unverifiable.

• Add explicit JSON Schema output definitions for every tool. Example for bark: 'output': {'type': 'object', 'properties': {'sound': {'type': 'string', 'description': 'The bark sound'}, 'timestamp': {'type': 'string', 'format': 'date-time', 'description': 'When the bark occurred'}}
• Rewrite tool descriptions to explain WHEN and WHY: 'Get the most recent bark event (timestamp and sound) to monitor dog activity or verify a bark occurred in the last N seconds. Use this after calling bark() to confirm the action succeeded.'
• Add constraint descriptions to parameter 'intensity': 'Intensity of the bark: "quiet" (soft woof, <60dB), "normal" (standard woof, ~75dB, default), or "loud" (aggressive bark, >85dB). Choose based on the desired response intensity.'
• For register_server, add: 'Constraints: server_id must be unique (alphanumeric + underscore, max 50 chars). Fails with 'server_exists' error if already registered, call discover_servers() to check. Endpoint must be a valid URL.'
• Add error guidance to register_server description: 'If registration fails with server_exists error, either use a different server_id or call discover_servers() to list existing servers. If endpoint is invalid, return a 400 error with format requirements.'
• Standardize naming: rename get_last_bark to retrieve_last_bark_event, get_description to describe_semantic_routing_function, for consistency with verb_noun + object pattern.
• Add tool annotations to tool definitions (not visible in source, but required for MCP): readOnlyHint: true for bark, get_last_bark, get_description, discover_servers; destructiveHint: false; idempotentHint: false for register_server, heartbeat (they change state).

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry