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

Annotations already declare readOnlyHint, idempotentHint, and closed-world behavior, so the safety profile is covered. The description usefully adds the algorithm (SHA-256), determinism, and the cost signal ('Free'), but it never states what the tool returns or what happens on a mismatch, which matters given there is no output 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?

A single front-loaded sentence with no filler; the cost note leads and the mechanism follows. Slightly dense and slightly overpacked for one sentence, but every clause carries information.

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, the description should explain the return value (boolean match, error on mismatch, etc.), and it does not. It covers inputs and intent adequately but leaves the agent guessing about the response, which is a real gap for a verification tool.

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% for two parameters, so the description must carry the load. It does clarify that 'result' is an object returned by any tool and that result_sha256 is the hash the caller holds, but it gives no encoding, casing, or format details for the hash string. Minimal compensation for the coverage gap.

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 with the mechanism: recompute SHA-256 of a 'result' object and compare against a held hash to prove integrity. It is unmistakably distinct from every astrology-domain sibling tool, so an agent can identify it without opening the schema.

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 makes the triggering condition clear: use it when you hold a result_sha256 for a result object returned by any tool and want to prove it was not altered. It does not name exclusions, but no alternative integrity-checking sibling exists, so the guidance is effectively complete.

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