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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds real context beyond that: the return is static markdown documentation, and it summarizes what each topic contains. It stops short of noting anything about caching, auth, or freshness.

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, front-loaded with what is returned before the topic list. Every clause carries information; nothing is padding.

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 simple read-only documentation fetch with a single optional enum parameter and an output schema that already describes the return shape, the description is nearly complete. Only the absence of explicit usage framing keeps it from being fully sufficient.

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 0%, so the description must carry the load. It does: each enum value is given meaning ('api' = main endpoint with recognition and parameters, 'streams' = continuous recognition and management, plus 'enterprise' and 'file-upload'), which is genuinely more than the bare enum names in the schema.

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?

States a specific verb and resource ('Returns the official AudD API documentation') and specifies the format (markdown). It is unmistakably distinct from the account/billing siblings (get_account_status, get_amount_owed, etc.), so an agent can select it without opening the schema.

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?

Usage is implied by the nature of the tool (fetch docs to learn about the API), but there is no explicit when-to-use statement, no guidance such as 'call this before configuring streams' or 'use to look up parameters,' and no exclusions. Adequate but leaves routing to inference.

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