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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the bar is lower, yet the description still adds real context: it excludes credential values and downstream provider API activity, and notes that the call itself creates no credential-access audit event — a non-obvious side-effect fact. It stops short of covering ordering, default limit, or response shape, which keeps it off a 5.

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 tightly packed sentences with no filler: the scope and event types come first, followed by parameters and return-behavior constraints. Every clause carries information an agent would otherwise have to guess.

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 3-parameter read-only listing tool with no output schema, the description covers what is returned, what is deliberately not returned, and how pagination works. Minor gaps remain (default page size, sort order, meaning of the 'service' value), but nothing essential for correct invocation is missing.

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?

With 0% schema description coverage the description must carry the load, and it does explain all three parameters: limit (1–50), an optional service filter, and cursor pagination. It does not define the format/values accepted by 'service' or the default limit and result ordering, so the semantics are directionally clear but not fully specified.

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 uses a specific verb+resource ("Inspect recent credential-retrieval attempts") and scopes it to the authenticated agent, naming the event classes covered (successful releases, policy denials, missing credentials). It also distinguishes itself from get_credential by stating it returns retrieval metadata rather than credential values.

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 rather than stated: an agent can infer this is the auditing/inspection tool while get_credential fetches the secret itself, but no explicit when-to-use or when-not-to-use guidance is given. There is no instruction about which sibling to pick for a given question, only a scope statement.

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