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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile is covered. The description adds that each entry carries a plain description and a review link, which is genuinely useful return-shape information given there is no output schema, but it omits notable behaviors such as the default pending filter and the limit cap.

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?

Three short sentences, front-loaded with what the tool returns and illustrated with concrete examples. No filler, though the closing sentence about Fine Structure is more context than instruction.

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 zero-required-parameter read tool with no output schema, the description supplies the essential missing piece: what an item looks like (plain description plus review link) and who acts on it. The remaining gap is that the default pending status and pagination behavior are left entirely to the schema.

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 only 50%: limit and status have no descriptions in the schema, and the description says nothing about filtering by status, limiting result count, or scoping to one agent. language and agent_id are documented in the schema, so the description adds no parameter meaning beyond 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 resource with concrete examples: actions agents are holding pending owner approval, such as a customer message or a payment. That is far more informative than the name alone, though it does not position itself against nearby siblings like list_agent_tasks or list_agent_activity.

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?

Usage is only implied: an agent understands this is where to look for items awaiting approval, and the note that the owner approves or rejects them in Fine Structure implicitly scopes this tool to read-only inspection. There is no explicit when-to-use, when-not, or guidance on the status filter.

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