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

With no annotations, the description carries the full burden and discloses meaningful behavior: it re-executes an HMAC-SHA512 signature over a fixed field subset, returns 'valid' plus verified claims, and makes a real HTTP call to the canonical endpoint. It omits auth requirements, failure modes, and rate limits, which keeps it from 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?

The purpose and mechanism are front-loaded, and most sentences earn their place. The last sentence ('makes a real HTTP call... actual platform response') partially restates the preceding offline-verifiable point, costing a bit of tightness.

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?

There is no output schema, and the description compensates by stating the return shape ('valid + the verified claims'). For a one-parameter verification tool with no annotations, this is nearly complete; only permission/auth context 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?

Schema coverage is 100% for the single required 'token' parameter, so the schema already documents the format (base64-encoded PTPAttestation). The description adds no further detail about the token, and the schema's 'optional: need=capability to gate on' note is not clarified anywhere. Baseline 3 is appropriate.

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 names a specific verb and resource ('Verify a Pabandi PTP attestation') and enumerates the four attestation types it covers. It does not differentiate itself from the sibling pabandi_verify_passport, which shares the 'verify' verb, so it stops short of full sibling disambiguation.

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?

It implies usage by calling itself 'the trust primitive every third-party action gates on', suggesting when an agent should reach for it. However, it gives no explicit when-to-use versus pabandi_verify_passport, and no exclusions or prerequisites.

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