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

No annotations are provided, so the description carries the full burden. It discloses the tool is 'x402-payable; no PAT required' and that it returns a list of creators. It does not mention destructive behavior or rate limits, but for a read-only search tool, this is sufficient, earning a 4.

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?

Two sentences: first covers purpose and parameters, second covers return fields and payment info. No redundant phrases, ideal for quick parsing. Earns a 5.

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?

With no output schema, the description explains return fields. Parameter coverage is high, and the tool's behavior is well-defined. It's nearly complete but could add more on pagination or output format, so a 4.

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 coverage is high (86%), so baseline is 3. The description adds value by summarizing parameters concisely and stating the return fields. It does not explain each parameter in detail but provides adequate context for the agent, warranting a 4.

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 verb 'Search' and resource 'PitchIQ's global Twitch/YouTube creator index', specifying key filtering criteria. However, it does not explicitly differentiate this tool from similar sibling search tools like pitchiq_v1_brain_search or pitchiq_v1_discover_search_curators, so a 4 is appropriate.

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?

The description implies usage for creators covering games/products but lacks explicit guidance on when to use this vs. alternatives like curator or podcast search. No when-not-to-use or alternative tool references are provided, keeping it at a 3.

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