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

Annotations already declare readOnly, idempotent, openWorld and non-destructive, so the safety profile is covered. The description adds real value beyond them by bounding what the verification does not cover (canonicality, freshness, security), but it says nothing about verification failure behavior, error signaling, or what a successful result looks like.

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 short sentences, front-loading the action and then the constraints; nothing is redundant. The density is partly achieved by jargon compression, which costs clarity rather than words.

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 output schema, a required nested `context` parameter at 0% schema coverage, and undefined jargon, the description is insufficient for an agent to call the tool confidently or interpret the result. The scope disclaimer is the only genuinely complete piece of information.

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 0%, so the description carries the full burden. It clarifies the role of trusted_key_fingerprint ('to verify identity') but leaves the required `context` object — a nested object with no schema detail — completely unexplained, so the agent cannot construct a valid call from the docs 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?

The verb 'Verify' and resource 'native quantitative Ed25519 attestation' are stated, but 'quantitative context' is domain jargon that is never unpacked, so the agent must infer what is actually being checked. It is distinguishable in tone from fet112.verify_attestation and fet112.verify_network_state_attestation only by the word 'quantitative', not by any explicit contrast.

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?

'Supply a trusted fingerprint to verify identity' gives one concrete call precondition, and the negative scope ('does not evaluate chain canonicality, freshness or security') usefully implies which sibling to pick for those concerns. However, no sibling is named and no positive trigger explains when this should be called instead of verify_attestation.

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