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

Annotations already declare idempotentHint=true, destructiveHint=false and readOnlyHint=false, so the safety profile is covered. The description adds genuinely useful context beyond that: 'Runs at once' signals synchronous, immediate effect with no preview/async job, and 'one Action' scopes the mutation to a single record rather than a bulk operation.

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?

Three short sentences, front-loaded with the primary action and its inverse, followed by timing behavior and the disambiguation pointer. Every sentence earns its place with no filler.

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-parameter, no-output-schema status toggle, the description covers what changes, immediacy of effect, and the main routing decision. It does not mention error/failure behavior (e.g., invalid action_id, unknown project), which is a minor gap given the tool's simplicity.

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%, and the schema already explains the status enum values and where action_id/project_id come from. The description's 'one Action' phrasing reinforces that action_id is singular, but adds no new syntax or format guidance beyond the schema — baseline 3.

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 states a specific verb pair (dismiss / reopen) applied to a specific resource (one Action), and explicitly names the sibling tool that handles the adjacent case ('To record that the work was done, use prepare_declare_implemented instead'). An agent can distinguish this from read_actions and prepare_declare_implemented without opening any 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?

It names the two conditions for use (dismiss an Action the user does not want to act on; reopen a dismissed one) and gives an explicit when-not/alternative for the 'work completed' path via prepare_declare_implemented. Nothing about tool selection is left to inference.

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