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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds a genuine behavioral fact beyond those annotations — that reading capacity does not reserve it — which is exactly the kind of side-effect clarification an agent needs before polling. It stops short of describing what the returned limit/admission fields look like.

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?

A single clause pair with the primary action front-loaded and the side-effect caveat appended where it is most needed. No redundant restatement of the tool name and no filler.

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-parameter read with no output schema, the description conveys the two things returned (task limit and queue admission state) and rules out the main worry (capacity reservation). It could go slightly further in indicating the shape or units of the limit value, but nothing essential to calling it correctly is missing.

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?

The tool takes zero parameters, so there is nothing for the description to disambiguate and the baseline of 4 applies. The description correctly avoids inventing parameter guidance for a parameterless call.

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?

"Read your current task limit and queue admission state" names a specific verb (read) and a specific resource (capacity/queue admission), which separates it from siblings like get_generation or estimate_generation that operate on individual generations. It is clear but never names an alternative tool, so sibling differentiation is left to inference.

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 clause "does not reserve capacity" implicitly tells an agent this is a safe pre-flight check rather than a capacity-consuming call, which is useful usage context. However, there is no explicit when-to-use statement, no named alternative, and no stated preconditions, so guidance remains implied rather than stated.

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