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

Annotations already declare the safety profile (readOnlyHint=false, idempotentHint=true, destructiveHint=false), so the description only needs to add context. 'Runs at once' usefully signals synchronous, non-scheduled execution and implicitly confirms the change is applied immediately. It omits what a reopen restores, permission requirements, and any post-change effects.

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?

Two short, front-loaded sentences with no filler; the operation is stated first and the execution trait second. 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?

For a three-required-parameter mutation with no output schema and no nested objects, the description is close to minimally viable. It lacks any pointer to how an agent obtains a valid action_id or what the resulting state looks like, though annotations cover reversibility safety.

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 must compensate. It maps the two enum values to intent ('dismiss'/'reopen' -> dismissed/open), which is genuinely additive, but project_id and action_id semantics and any linkage between them remain unexplained.

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 ('Reopen or dismiss one Action') and enumerates the only two state transitions, which is more informative than the title alone. It does not name the sibling read_actions as the companion lookup tool, so differentiation is left implicit.

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?

No when-to-use guidance, no prerequisites (e.g. that you need an action_id obtained from read_actions), and no exclusions relative to siblings. The only hint is 'Runs at once', which is a timing trait rather than selection guidance.

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