Single tool with minimal schema and description. Tool name 'get_circuit_status' is appropriately verb-prefixed, but the description (18 chars) falls below the 20-char minimum and lacks context on WHEN to use it or WHAT it returns. Input schema present but parameter 'provider' has no description, violates the requirement that every parameter must explain what it controls. No output schema documented. No error handling guidance. No parameter constraints (enums, validation rules). Tool definition is directly visible in code, so not capped at 50, but quality is poor.

• Expand tool description to 50 - 150 characters. Example: 'Check the circuit breaker state (CLOSED, HALF-OPEN, OPEN) for an LLM provider. Use this to determine if a provider is available before routing requests. Returns the current state and failure count.'
• Add description to 'provider' parameter: 'The name of the LLM provider to check (e.g., primary_provider_a, secondary_provider_b, emergency_provider_c). Must match a provider registered in the gateway.'
• Document the output schema in the tool description or as a separate schema field. Example: 'Returns {provider: string, state: string (CLOSED|HALF-OPEN|OPEN), failure_count: number}'.
• Add error handling guidance: 'If provider is not found, returns error with available provider names. If circuit is OPEN, consider calling execute_with_failover() to route to a fallback provider.'
• Consider adding an enum constraint for 'provider' if the set of valid providers is known and finite. This prevents hallucinated provider names.