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

Annotations already declare readOnly/idempotent/closed-world, so the safety profile is covered; the description goes further by defining the evidenceLevel tiers in behavioral terms (receipts signed by both parties vs. operator-authorized verifier) and enumerating what each flag means. It does not cover not-found/unknown-DID behavior, which is the remaining gap.

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?

Purpose is front-loaded in the first clause, then the return-field semantics follow in a compact block. Dense but every clause carries interpretive value since there is no output schema; minor cost that the tier definitions are packed into one long sentence.

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?

With no output schema and one trivial param, the description correctly carries the burden of explaining return values — trustScore, components, evidenceLevel tiers, and flags — which is exactly what an agent needs to interpret results. Missing only failure/empty-result behavior.

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?

Single parameter at 100% schema coverage, so the schema already defines agentId; the description only restates that it is a did:key id with no additional format or validation detail. Baseline 3 is appropriate when the schema does the work.

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 ('looks up'), resource ('INAM reputation'), and keying ('by did:key id'), which is enough to separate it from the receipt/verify/hash siblings. It stops short of naming the nearest sibling (inam_check / inam_search_agents) to explain the boundary.

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?

There is no explicit when-to-use, when-not-to-use, or alternative routing statement; the agent must infer from the name that this is the pre-transaction reputation lookup rather than a raw check or search. The description spends its space on output semantics instead of invocation guidance.

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