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

Annotations already declare readOnlyHint=true, openWorldHint=true, and idempotentHint=true. The description adds that unsupported features remain explicit blockers, and that existing response forms must be filled on copies—both useful behavioral nuances beyond the safety profile. No contradiction with annotations.

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 sentences, concise and front-loaded with the primary purpose. The second sentence about response forms is slightly tangential but still relevant. No waste, though the order could be tighter.

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 read-only, zero-parameter tool with no output schema, the description covers the key usage point (read limits before production) and adds blockers context. It doesn't describe return format, but for a simple capabilities check this is acceptable.

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 has 0 parameters, so the schema is trivially 100% covered. The description doesn't need to explain parameters. Baseline 4 is appropriate; nothing is missing.

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 clearly states a specific verb and resource: 'Read the actual multi-document rollout limits.' It also gives a clear purpose: to check limits before promising file production. This distinguishes it from sibling tools that deal with production, export, or other document operations.

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?

It explicitly says 'before promising file production,' which is a clear usage context. It doesn't name alternatives, but it implies this is a pre-check tool. The instruction about filling forms on copies is more behavioral than usage guidance, but the timing cue is sufficient.

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