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

Annotations already provide readOnly, openWorld, idempotent, non-destructive. Description adds deterministic behavior and pricing, and clarifies it reports under caller-supplied rules. It doesn't contradict annotations. However, it doesn't explain what 'material differences' means or how rules are applied, so it adds some but not rich context.

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, front-loaded with core function, then domain and pricing. No unnecessary words, but the phrase 'cannot select' is ambiguous and not concise. Otherwise 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?

For a tool with 5 parameters and no output schema, the description is insufficient. It doesn't explain how to construct expected/observed, what 'material differences' means, how verification rules work, or what the output looks like. The agent would need to infer a lot. Given the complexity, this is incomplete.

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 has no descriptions (0% coverage), so description must explain parameters. It explains expected and observed implicitly ('caller-supplied expected and observed values') but does not explain ignore_paths, required_paths, or numeric_tolerance. These are only named in schema without meaning. Thus description only partially compensates.

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 states it deterministically compares expected and observed values and reports material differences, which is specific. It also mentions intended domain (trust identity permission) and exclusions. However, it doesn't differentiate from many sibling verification tools with similar names and purpose, so it's clear but not fully distinguishing.

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?

No explicit guidance on when to use this tool versus alternatives. It says 'Intended for trust identity permission' which is vague, and 'cannot select' is confusing. It provides exclusions (legal, identity, etc.) but no positive selection criteria. With many sibling verification tools, this is a gap.

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