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

Annotations already declare readOnlyHint, idempotentHint, and non-destructive behavior. The description adds useful behavioral context beyond that: the operation is deterministic, evaluates caller-supplied expected vs observed values, and reports material differences. It also discloses that the resource is paid at $0.002 per call, which is not in the 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?

The description is three sentences with no filler: purpose, usage boundaries, and pricing. Each sentence earns its place, and the core behavior is front-loaded.

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?

Despite having 5 parameters, no output schema, and no parameter-level schema descriptions, the description does not explain the comparison semantics, the meaning of material differences, verification rule behavior, or the expected/observed value types. It covers purpose and price but is not complete enough for reliable invocation.

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 description coverage is 0%, so the description must compensate, but it only vaguely references 'expected and observed values' and 'caller-supplied verification rules.' It does not explain the meaning or expected shape of expected, observed, ignore_paths, required_paths, or numeric_tolerance, leaving an agent without enough information to construct correct parameter values.

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 behavior: deterministically comparing caller-supplied expected and observed values and reporting material differences under caller-supplied rules. It also names an intended domain (trust identity permission / latency excess), but it does not differentiate this tool from the many similarly named trust_identity_permission_verification siblings.

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 explicitly states when to use it ('Intended for trust identity permission / latency excess') and provides a clear exclusion list ('Do not use for legal, identity, sanctions, fraud, contractual, or regulatory adjudication'). This gives an agent strong routing guidance even without naming a specific alternative tool.

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