create_authors_by_id_match

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

Annotations already declare readOnlyHint=false, destructiveHint=false, and idempotentHint=true, so the description doesn't need to restate those. However, it adds little beyond the obvious POST implies a mutation. It doesn't explain side effects (e.g., updating author metadata), what happens on a successful match, or any auth/rate-limit requirements. The advice to read the schema endpoint is useful but doesn't disclose behavioral traits.

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 short and front-loaded with the purpose. It includes the HTTP method and path, which is redundant but helpful for context. It then lists the two parameters with brief notes. Every line earns its place; there is no fluff. It could be slightly more structured, but it is efficient.

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 mutation tool with an open body schema and no output schema visible, the description is incomplete. It doesn't explain what 'quick match' does, what the response looks like, or any prerequisites beyond reading the schema endpoint. It also doesn't mention idempotency or side effects, even though annotations hint at these. An agent would likely need to consult external documentation to use it safely.

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 0% for the body parameter, which is just an open object. The description compensates by telling the agent to read the matching GET or /schema endpoint to learn the expected fields, which is valuable guidance. For 'id', it simply says 'Path parameter,' which is self-evident from the schema. Overall, the description adds meaningful direction for constructing the body.

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 states a specific verb and resource: 'Match the author against Audible using quick match.' It clearly indicates the action is matching an author, and the endpoint path is provided, which helps distinguish it from other match tools for items or podcasts. However, it doesn't explicitly differentiate from sibling match tools beyond the resource, so it's not a 5.

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 given about when to use this tool versus alternatives. It does instruct the user to read the matching GET or /schema endpoint first, which is a prerequisite, but there is no mention of conditions or exclusions that would route an agent to a different match tool. The description lacks any 'when not to use' or comparison with siblings.

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