discover_services

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions searching but doesn't describe what the search returns (e.g., list of services, metadata), whether it's paginated (implied by parameters but not stated), authentication requirements, rate limits, or error conditions. This leaves significant gaps for a search operation.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence that directly states the tool's function without unnecessary words. It's appropriately sized and front-loaded with the core purpose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a search tool with 5 parameters, no annotations, and no output schema, the description is insufficient. It doesn't explain what the search returns, how results are structured, or provide context about the satring.com platform. The agent would lack critical information to use this tool effectively.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 60%, with two parameters having no descriptions in the schema (page and page_size). The description doesn't add any parameter-specific information beyond what's in the schema, failing to compensate for the coverage gap. However, the schema provides reasonable documentation for most parameters, meeting the baseline.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Search') and target resource ('satring.com for L402/x402 paid API services'), making the purpose understandable. However, it doesn't differentiate this search tool from sibling tools like 'find_best_service' or 'list_services', which likely have overlapping functionality.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided about when to use this tool versus alternatives like 'find_best_service' or 'list_services'. The description only states what the tool does, not when it's appropriate or what distinguishes it from similar tools in the context.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.