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

Annotations already declare readOnlyHint=true, so safety is covered. The description adds genuinely non-structured context: the item states it returns (completed/cancelled/failed) and the interpretive warning 'Never treat approval as execution,' which guards against a real misinterpretation risk. It does not cover ordering, time window, or pagination behavior.

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?

Two short sentences, front-loaded with the core action and a tight, high-value caveat. No filler, no 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?

An output schema exists, so return-shape explanation is unnecessary, and readOnlyHint covers the safety profile. Combined with the parameter fully documented in-schema, the definition is nearly complete; only the time semantics of 'recent' remain unaddressed.

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 100% and the single limit parameter (1-100) is fully documented in the schema, so the baseline is 3. The description adds nothing about the limit or what 'recent' means in relation to it.

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 (read) and resource (recent work) and narrows scope to completed, cancelled and failed items, which implicitly separates it from the live inbox tools. It stops short of naming any sibling (e.g. agent.inbox.list) explicitly, so differentiation is inferred rather than stated.

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 scope phrase 'completed, cancelled and failed items' implies this is for reviewing past/finished work rather than active claims, which is usable context. However, there is no explicit when-to-use, no named alternative, and no statement of when NOT to use it versus agent.inbox.list or agent.inbox.get.

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