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

Annotations already indicate readOnlyHint=false and destructiveHint=false. The description adds that this is a write operation (scope leads.write) and requires explicit confirmation, which is useful. However, it does not explain side effects, idempotency, or error behavior, so it adds only moderate value beyond annotations.

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 description is one short sentence with all critical information front-loaded: the step, the action, the precondition, and the required scope. Every word earns its place.

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 simple one-parameter tool with no output schema, the description covers the step, the precondition, and the required scope. It could mention that action_id must reference a pending prepared action or describe error cases, but these are minor gaps given the low complexity.

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?

The schema has 0% description coverage and the description does not explicitly explain the single parameter action_id. It only implies its role via 'action preparee', leaving the agent to infer that action_id identifies the prepared action. The description should have compensated for the schema 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?

The description states a specific verb ('execute') and a specific resource ('action preparee'), and clearly locates it as the second step after explicit visitor confirmation. This distinguishes it from siblings like lister_actions (listing) and annuler_action (cancelling).

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 gives a clear precondition ('APRES confirmation explicite du visiteur') and positioning ('DEUXIEME etape'), which implies it should only be used after a prepared action and confirmation. It does not explicitly name alternatives or state when not to use it, but the context is clear enough.

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