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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It describes the on-chain registry check and the badge assignment, and explicitly states optionality. However, it does not mention whether the action is read-only or has permanent effects, nor any error conditions or auth requirements. Moderate transparency.

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?

The description is a well-organized paragraph with a clear lead-in ('[TRUST] Verify...'). It includes a registration URL and a reassurance about optionality, both useful. Every sentence earns its place, though slightly longer than strictly necessary. Structure is effective.

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?

Given no output schema, the description does not explain what the tool returns (e.g., success message, badge status, error if not registered). It describes the action and optionality but lacks return-value context and potential edge cases. For a simple tool, it is mostly complete but has notable gaps.

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 schema covers the single parameter 'agent_wallet' with a clear description and regex pattern (100% coverage). The tool description adds context about the registry and registration link but no additional parameter semantics. Baseline 3 is appropriate since the schema does the heavy lifting.

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 clearly states the verb 'Verify' and the resource (World AgentKit / AgentBook registry), and explains the outcome (World ID trust badge). It is distinct from sibling tools like check_agent_standing, though it doesn't explicitly name alternatives. This is clear but not fully differentiated from potential similar verification tools.

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 description notes it is optional and that unverified agents can still use the platform, which gives partial usage guidance. However, it doesn't specify when to choose this over other verification or standing tools, nor does it state prerequisites beyond registration. Implied usage but no explicit alternatives.

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