agent_key_verify

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

With no annotations, the description carries the full behavioral burden. It does add one genuinely useful trait: the comparison runs on the relay rather than locally, which tells the agent keys leave the local environment. But it never states the outcome semantics (what is returned on match vs mismatch) or whether it is read-only, leaving significant gaps for a tool with no annotation coverage.

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, so it is compact. But the second sentence is vague and arguably misleading rather than informative, so it fails to earn its place; the size is right, the content of the second clause is not.

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 no annotations, so the description must explain the return semantics of a verification call. It does not say what a match yields, what happens on mismatch, or how a pin is established. For a verification tool whose entire value is the boolean outcome, this is a substantial omission.

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 a single 'did' parameter documented as 'Agent DID', so baseline is 3. The description adds no syntax, format, or meaning beyond the schema, and 'your pin' is implicitly the second operand even though it is not a declared parameter.

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 first sentence states a recognizable verb+resource ('Compare an agent's current keys with your pin'), which is clear enough on its own. However, the second sentence ('Acts as the identity in the local credential store') is opaque and conflates verification with identity resolution, muddying rather than sharpening the purpose. No sibling such as agent_key_pin or agent_get_identity is named to disambiguate.

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?

No when-to-use or when-not-to-use guidance is given. The description never mentions the related sibling tools (agent_key_pin to set the pin, agent_get_identity to fetch identity, agent_verify_message), so the agent has no routing signal. The implied usage (verify keys against a pin) must be inferred entirely.

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