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

No annotations are provided, so the description carries full burden for behavioral disclosure. It states the tool verifies and returns a token, but doesn't mention failure modes, token expiration, prerequisites like needing a prior challenge, or whether it's a read-safe operation. This is a significant gap for a tool with no annotations.

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 a single, front-loaded sentence that clearly conveys the primary action and outcome. There is no redundancy or waste, making it appropriately concise for a straightforward verification tool.

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?

Despite the tool having 7 parameters, a nested object, and no output schema, the description is too brief. It doesn't explain the expected return value beyond 'token', lacks the prerequisite that a nonce must come from request_agent_wallet_challenge, and doesn't address how the optional action/payload parameters affect verification. The description is incomplete given the tool's complexity.

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 100%, with rich descriptions and enums for parameters. The tool description adds minimal semantic value beyond saying 'wallet-signed' and 'short-lived', so it doesn't surpass the baseline 3 provided by 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?

The description clearly states the tool verifies a wallet-signed auth challenge and returns a short-lived session token. It mentions agent registry flows, giving context and differentiating it from unrelated siblings. However, it doesn't explicitly contrast with request_agent_wallet_challenge or other related tools, so it falls short of a perfect 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?

The description implies use within agent registry flows but doesn't explicitly state when to use this tool versus alternatives, such as after requesting a challenge via request_agent_wallet_challenge. No exclusions or alternative tool references are provided; the usage context is only implied.

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