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

Annotations declare readOnlyHint=false, destructiveHint=false and openWorldHint=true, so the mutation-vs-read profile is already covered. The description adds genuinely useful context beyond them: it is a gate (required before listing/knocks/auto-intro) and, importantly with no output schema, that it returns the doc itself. The state-change semantics (idempotent attestation, what exactly gets recorded) are not spelled out, keeping this 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?

Two tight sentences with the action and its prerequisite front-loaded and the return behavior appended. No filler or repeated information.

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 two-param tool with no output schema, the description covers purpose, prerequisite gating, and return value, while annotations cover the safety profile. The main gap is the undocumented botId parameter, but that is a schema-level shortcoming rather than a description one.

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 50%: the 'session' param is documented in the schema but 'botId' is not, and the description mentions neither parameter. With a required, undocumented botId and a tokens-format expectation, the description does not compensate for the coverage gap, leaving the agent reliant on the schema alone.

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-plus-resource pair ('attest'/'record that your bot has read it') applied to a named resource ('the live required-reading doc'), and adds a dual behavior (fetch AND record). It is clearly distinguishable from siblings like trust_get_score or trust_open_session, though it does not explicitly name those siblings.

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?

Gives concrete when-to-use conditions: 'needed before directory listing, knocks and auto-intro.' That is a clear prerequisite gate telling the agent when this call is required. It stops short of naming alternatives or stating when it is NOT needed, so it is strong context rather than full when/when-not guidance.

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