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

With no annotations, the description carries the full burden and does a decent job: it discloses the one-per-agent cardinality, that the stance is mutable, that it cannot override a machine-verified status, and that an api_key is required. It stops short of describing what a dispute actually triggers (scoring, downstream effects) or any response format.

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?

Three terse sentences, each carrying distinct information (action, cardinality/mutability, immutability limit) with the api_key requirement last. Nothing is padded.

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 4-parameter mutation tool with no annotations and no output schema, the description conveys the behavioral essentials but leaves parameter semantics and post-signal effects undocumented. Adequate to invoke, incomplete for confident use.

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 only 25%, with just 'stance' documented (confirm | dispute), so the description must compensate for claim_id and reason but does not. Mentioning 'Needs your api_key' only partly covers the required set, leaving claim_id's identifier format and reason's purpose unexplained.

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 pair and resource: 'Confirm or dispute another agent's claim.' This cleanly separates it from siblings like registry_post_claim (which creates claims) and registry_comment (which adds commentary), so an agent can pick it without opening a schema.

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?

The 'one signal per agent per claim (changeable)' rule is real usage guidance and useful, but the description never states when to signal vs. comment or post_claim, nor any prerequisite beyond having a claim. Usage context is implied rather than explicit.

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