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

Goes well beyond annotations by disclosing exact cost per successful call, authorization requirements, and the billing implication of a new requestId. This is exactly the non-obvious behavior an agent needs to avoid surprise charges, and it complements the idempotentHint rather than relying on it.

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?

Four dense sentences with no filler; the core purpose is front-loaded before the commercial and auth details. Slightly more structured formatting (e.g., bullet list for prerequisites) would improve scannability, but current prose is still efficient.

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?

Given a nested input schema, output schema, and annotations, the description covers the full call path: precedent tool, prerequisites, auth, cost, recovery, and billing behavior. Nothing needed for correct invocation 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?

Schema already documents requestId and maxPriceMicroUsd, and the description adds semantic weight by tying requestId to prepared arguments, recovery, and a new billable operation. The names array is self-explanatory from the tool purpose, so the 67% schema coverage is sufficiently compensated.

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?

Description opens with a precise verb and object: find duplicate or easily confused tool names, with explicit normalization dimensions (Unicode, case, separator). This fully distinguishes it from siblings such as agents_config_audit or agent_utilities_prepare.

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 description gives clear operational context: call agent_utilities_prepare first, require credits and a private Authorization header, and reuse prepared arguments for recovery. It doesn't list exclusions or equivalent alternatives, but the tool's purpose is unique enough that this is not a significant gap.

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