refresh_session

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

With no annotations provided, the description carries full responsibility for behavioral disclosure. It mentions 'refresh' which implies a state change, but does not indicate whether this is destructive, requires special permissions, or has side effects on the session state. There is no mention of what happens if cookies are invalid or if the operation can fail. This is a significant gap for a mutation-like 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?

The description is a single, efficient sentence with no filler. It states the action and target clearly. Every word contributes to meaning, and there is no redundancy.

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 the tool has no parameters, no output schema, and no annotations, the description is minimal but borderline acceptable. However, it lacks critical context such as when this tool should be invoked (e.g., after long idle periods, before high-stakes requests), what 'protective cookies' protect against, and whether there are any errors or side effects. For a session-management tool, an agent would benefit from knowing typical use cases and limitations.

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 tool has zero parameters, so schema coverage is 100% and there is nothing to explain. The description correctly omits parameter details. It would be unreasonable to expect parameter-level semantic information when no parameters exist.

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 a specific verb ('refresh') and resource ('protective cookies') for the current web session. This is distinct from all sibling tools which focus on store/product operations, so an agent can easily differentiate it. It could be slightly more explicit about what 'protective cookies' are, but the action is unambiguous.

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?

There is no guidance on when to use this tool versus alternatives, nor any prerequisites or conditions that would warrant calling it. The description implies it maintains session integrity but does not state under what circumstances a refresh is needed (e.g., after authentication expiry, before sensitive operations). This leaves the agent to infer usage.

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