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

The description goes into useful detail beyond the annotations: it clarifies there is no identity cache, no token revocation, no state reset, and that a failing auth state won't be affected. This prevents the agent from assuming real logout behavior. No contradiction with idempotentHint or destructiveHint.

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 tight sentences, with the core 'acknowledgement only' statement front-loaded. Each sentence earns its place by adding essential context about limitations and the correct alternative.

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?

Given zero parameters, a present output schema, and supporting annotations, the description fully covers what the tool is, what it lacks in effect, and how to achieve a true logout. Nothing essential is missing.

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?

With zero parameters and 100% schema coverage, there is nothing to document. The description properly emphasizes that the operation is an acknowledgement, which is all that is relevant. Baseline 4 applies.

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 clearly states that this is an acknowledgement-only operation with no identity cache to clear. It explicitly differentiates itself from a real logout by listing what it does NOT do, so an agent can precisely understand the tool's role despite the generic name.

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 explicit when-not-to-use guidance: it does not end a login, revoke a token, or invalidate a session_request_id. It also provides the correct alternative — 'stop sending the credential' — making the usage context unmistakable.

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