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

Annotations already declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint=false, so the safety profile is fully covered. The description adds value with 'Free' (a cost disclosure) and the data scope (identity, reputation summary, validations), which is useful behavioral context. No contradiction with annotations, but the added behavioral depth is modest given the 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?

The description is a single, tightly packed sentence with zero wasted words. The key attribute 'Free.' is front-loaded, and the rest states scope and returned data efficiently. Every element earns its place.

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 single-parameter, read-only tool with a full output schema and complete annotation coverage, the description covers cost, scope, and returned data. The main gap is the absence of usage context (when to use versus fuci_agent or other siblings), but the annotations and output schema relieve the description of explaining safety and return-value structure.

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 coverage is 100%, so the single required parameter agentId is already documented as an 'ERC-8004 agentId'. The description confirms the agentId maps to any ERC-8004 agent on Arc, adding slight value but no syntax or format details beyond the schema. Baseline 3 is appropriate when the schema carries the full parameter documentation burden.

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 names the resource precisely ('reputation... for any ERC-8004 agent on Arc') and lists what is returned (identity, reputation summary, recent validations), which implies a read/retrieve action. It lacks an explicit verb like 'Get' or 'Retrieve', and it does not name a sibling to differentiate from, though the content (reputation/validations) clearly separates it from bonding, launches, oracle, and market-search siblings.

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 guidance on when to choose this tool over alternatives. The closest sibling, fuci_agent, likely overlaps in the agent-information space, yet no differentiation or exclusion is given. The description offers context (free, on-chain, any agent) but nothing about when to reach for this versus another tool.

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