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

The readOnlyHint=true annotation already establishes that this is a non-mutating check, so the description only needs to add context. It does convey that both schemas and descriptions are compared against a pinned value, but it never explains what 'Dual-Hash' means, whether a mismatch is returned as a boolean/verdict, or how the two hashes differ.

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; the verb and object lead immediately. The only cost is the unexplained 'Dual-Hash' term, which spends words without fully informing the reader.

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 two-parameter read-only check with no output schema, the description covers the what but not the outcome: it does not say whether the result is a pass/fail verdict, a diff, or which of schema vs. description drifted. With annotations covering safety, this is adequate but leaves a real gap in interpreting the result.

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 100% for both parameters, so url and pinnedSchemaHash are already fully documented as endpoint and 64-char hex SHA-256 hash. The description's mention of a 'pinned Dual-Hash' loosely reinforces pinnedSchemaHash but adds no format, sourcing, or acquisition detail beyond the schema.

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 (Verify) and resource (an MCP server's tools schema or descriptions) plus the comparison basis (a pinned Dual-Hash), so the operation is unambiguous. It does not, however, distinguish itself from the sibling actionguard_inspect, leaving the boundary between 'check drift' and 'inspect' to inference.

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 or when-not-to-use guidance, and the only sibling, actionguard_inspect, is never mentioned even though it is the obvious alternative for examining a server. The agent must guess whether drift checking is a pre-flight step, a post-deploy audit, or a substitute for inspection.

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