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

No annotations are provided, so the description carries the full disclosure burden, and it discloses almost nothing: no indication of what a positive/negative answer looks like, whether historical or live data is checked, scope of 'the fleet', or any permissions/rate limits. 'Propagating' hints at a time dimension but is never defined. This is a read-style query where the safety profile and return semantics are entirely unstated.

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?

A single short sentence with no filler, and the subject (payload fingerprint propagation in the fleet) is front-loaded. The interrogative framing is efficient if slightly indirect for a tool description.

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?

With no annotations, no output schema, and no parameters, the description is the only source of information, and it omits the return value, the input mechanism for the fingerprint, and any behavioral constraints. For a zero-arg, zero-annotation tool the definition needs to work considerably harder to be callable with confidence.

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 input schema is an empty object (0 parameters), which normally sets the baseline at 4, but the description explicitly references an input — 'this payload fingerprint' — for which no parameter exists, creating an unresolved question of how the fingerprint is supplied. The description does not clarify this gap, so it falls below the zero-param baseline.

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 conveys the subject matter precisely — a lookup of whether a payload fingerprint has been observed propagating across the fleet — but it is phrased as a question rather than a verb+resource statement, and the actual operation (query/check) is left implicit. Nothing distinguishes it from siblings like egress_check, which could plausibly answer a similar question about a payload.

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?

There is no guidance on when to reach for this tool versus egress_check, controls_verify, or telemetry_report. The phrasing implies a triage/verification context, but no condition, prerequisite, or alternative is named. The agent must guess from the sibling list alone.

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