get_discovery_metadata

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

No annotations provided, so description must convey behavioral traits. It states the tool fetches metadata, implying a read-only operation, but does not mention side effects, authentication, rate limits, or error conditions. Minimal disclosure.

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?

Description is two sentences and 19 words, very concise. The repeated 'free' is slightly redundant, but overall front-loads the key action and sources.

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 zero-parameter tool with no output schema, the description is fairly complete in naming the sources. However, it does not describe the return format or behavior when sources are missing, leaving some ambiguity.

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?

Input schema has no parameters, so baseline score is 4. Description does not need to add parameter semantics, and it correctly lists the metadata sources as static endpoints.

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?

Description specifies the verb 'Fetch' and the resource 'discovery metadata' from specific well-known sources (index.json, llms.txt, openapi.json, x402). Purpose is clear but does not explicitly distinguish it from sibling tools that may also fetch metadata, such as inspect_x402_challenge.

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 on when to use this tool versus alternatives. The word 'free' hints at no cost but does not clarify prerequisites, context, or contradictions with other tools.

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