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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered externally. The description adds the useful scoping detail that the numbers are per-API-key and reset by calendar month, but says nothing about reset timing precision or staleness of the figures.

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?

It is a single front-loaded sentence with no filler, and the scoping qualifiers (calendar month, API key) come after the core noun phrase. No structural problems, though the sentence is terse enough that a brief use-case clause would have fit without bloat.

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-only quota check with full annotation coverage and an output schema describing the returned counts, the description supplies everything needed to select and call it correctly. No missing behavioral or parameter information remains.

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 per the baseline a 4 applies; there is no parameter meaning for the description to add or omit. The phrase 'for the API key in use' usefully clarifies that the implicit credential determines scope.

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 resource and metric: Deep Audits used and remaining for the current API key, scoped to the calendar month. It is clearly a read-only quota query and distinguishable from deep_audit/start_deep_audit by its measurement framing, though it never explicitly contrasts itself with the generic usage sibling.

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: check this before or after running a deep audit to see allowance. There is no explicit when-to-use or when-not-to-use guidance, and no mention of which alternative to consult for non-audit quota (e.g., the generic usage tool), so the agent must infer the context.

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