verify_agent_identity

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

The description details the fetch and validation process, including what is checked for each document type and the return format. It notes the need for network access. However, it does not explicitly state that the tool is read-only and safe to call multiple times, which would be helpful given the lack of annotations.

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 concise, well-structured with sections, and front-loaded with the purpose. Every sentence adds value without redundancy.

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?

The description explains input, output (validation report with details), and requirements. It is complete for a single-parameter tool with an output schema. Minor omission: handling of invalid URLs or malformed documents is implied in 'any issues' but not explicitly described.

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 single parameter 'url' is described as 'URL to a DID document or A2A Agent Card JSON file' with concrete examples. This adds meaning beyond the schema's minimal 'type: string', compensating for the 0% schema description coverage.

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 it fetches and validates an agent's identity from a DID document or A2A Agent Card, specifying the verb (fetch and validate) and resource (identity document). It distinguishes from sibling tools like arp_check and coc_verify, which likely deal with different validation contexts.

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 provides examples of URLs and notes the requirement for network access, but does not explicitly state when to use this tool vs. alternatives (e.g., get_trust_evidence, trust_stack_info). Usage context is implied but lacks explicit exclusions or alternative guidance.

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