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

Annotations already declare readOnly/idempotent/non-destructive/closed-world, so the safety profile is covered. The description adds real value beyond that: it discloses the finding categories returned (over-granted scopes, wildcards, write-where-read-would-do, intent contradictions) and, importantly, the full payment protocol — price, network, payTo address, EIP-3009 flow, the 402 retry loop, and an SDK. That payment detail is essential operational context an agent cannot get from the schema.

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 purpose is correctly front-loaded in the first sentence. But the 'VALUE' paragraph is marketing persuasion ('the exposure is the whole estate') that does not help an agent decide or invoke. The payment section is necessary given no auth field exists, so it earns its place, but the whole could be materially tighter.

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 paid, read-only analysis tool with an output schema and full safety annotations, the description covers purpose and payment mechanics adequately. The gaps are the unresolved overlap with other permission-audit siblings and the unexplained `subject` parameter and permissions array shape, which an agent must guess when constructing the call.

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 nominally 100%, but every parameter description is the same placeholder string '[POST /v1/security/permission-audit]', which conveys no meaning. The description implies the semantics of `permissions.task` and `permissions.permissions` through the audit framing, but says nothing about `permissions.subject` or the expected shape of array items (typed as bare `{}`). Baseline 3 is warranted; the description neither compensates for nor worsens the hollow schema text.

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?

States a specific verb-and-resource pair ('audit an agent's declared permissions') and sharpens it with the comparison target ('against the task it claims to perform'), plus an enumerated list of what the report contains. An agent can tell this is a static permission-vs-intent analysis, not a runtime scan. It does not, however, distinguish itself from the near-identical sibling audit_declared_permissions, which an agent would have to disambiguate on its own.

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 explicit when-to-use, when-not-to-use, or alternatives statement. The description never mentions audit_declared_permissions, assess_tool_permission, agent_security_assessment, or run_agent_security_scan despite several siblings occupying adjacent territory. Usage must be inferred entirely from the purpose sentence.

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