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

The annotations already establish readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds nothing beyond that: it does not say what happens when a permission appears on both lists, whether deny takes precedence, or what the comparison result looks like. For a comparison/decision tool, precedence semantics are the core behavioral question and are left undisclosed.

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?

A single front-loaded sentence with no filler or repetition. It is efficient, though the terseness is partly the source of the semantic gaps rather than a virtue in itself.

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?

With no output schema and 0% parameter coverage, the description must explain both input semantics and the shape of the comparison result; it does neither. For a three-parameter policy-decision tool, an agent is left guessing about precedence rules and return values.

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% across three parameters, so the description carries the full burden and fails to meet it. It implies that 'requested' maps to requested, 'allowed' to allowlist, and 'denied' to denylist, but never states element format (plain strings, glob patterns, wildcards), whether 'denied' is optional, or that 'allowed' is required.

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 names a specific verb and resource set: comparing requested agent permissions against an allowlist and denylist. That is concrete enough to distinguish it from unrelated siblings like privi_json_merge_preview or privi_backoff_window, though it never names the closest relative (privi_pro_scope_excess) to clarify the boundary.

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?

There is no when-to-use guidance, no preconditions, and no mention of alternatives. An agent cannot tell from the description whether this is meant for pre-flight validation, post-hoc auditing, or policy authoring, nor when to prefer privi_pro_scope_excess instead.

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