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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, so the safety profile is covered. The description adds genuine value beyond that by disclosing the 'pending only' filter and permission-based scoping (named/delegated requests included), but it says nothing about pagination behavior or result contents.

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 tight sentences with the scope constraint front-loaded and no filler. The second sentence earns its place as disambiguation, though it could have named the decision tool explicitly to be more actionable.

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?

There is no output schema, so the description is the only place an agent could learn what a request record contains or how results are ordered/paged, and it omits both. For a simple list tool with clear annotations this is acceptable but not complete.

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 0%, so the description carries no information about the wrapped 'input' object's sort/limit controls. However, the schema itself is self-explanatory with enums (oldest/newest), defaults, and 1-100 bounds, so the practical gap is small — a baseline 3 rather than a failing grade.

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 states a specific verb and resource ('Read pending requests') plus a visibility scope ('you are permitted to see, including named/delegated'). It implicitly separates itself from decision tools, though it never names resolve_approval_request or preview_resolve_approval_request, which are the closest 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?

'A request decision and invoice approval are separate actions' hints that acting on a request is a different tool, but the boundary is only implied; no tool name is given and no conditions for choosing list_approval_requests over get_work_queue or get_review_queue are stated. Usage is inferable but not explicit.

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