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

Annotations already declare readOnlyHint=true and destructiveHint=false. The description adds value by stating the tool confirms token validity and shows current rating, which implies error behavior on invalid tokens and reputation retrieval. This context goes beyond the annotations and does not contradict them.

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 two sentences, front-loaded with the core purpose and then the recommended usage. There is no filler or redundant information; every word contributes to clarity and actionability.

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, zero-parameter, read-only tool without an output schema, the description is largely complete: it states what is returned, when to use it, and the intent (confirm token, see rating). It could be slightly more complete by explicitly distinguishing from the sibling 'whoami' tool, but this is a minor gap given the context.

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?

The tool has zero parameters, so the schema description coverage is 100% by default. With no parameters to document, the baseline for this dimension is 4. The description appropriately omits parameter details since there are none.

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 'Return' and a clear resource 'identity behind your agent token' with enumerated fields (handle, reputation, status, payout wallet, public key). It is unambiguous about what the tool does, but it does not explicitly differentiate from the sibling tool 'whoami' which could be confusing for an agent choosing between them.

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 provides a clear usage context: 'Use this first to confirm the token works and to see how the swamp currently rates you.' This tells the agent when to invoke it, but does not mention alternatives or exclusions (e.g., when to use 'whoami' instead), so it lacks explicit when-not guidance.

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