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

With no annotations, the description alone must disclose behavioral traits. It indicates that the session is cleared, but does not mention irreversibility, side effects on related data, or permission requirements. For a destructive operation, this is a significant omission.

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 short sentence, which is concise, but it trades away needed detail. It is not a tautology, yet it provides only a minimal label-like statement and lacks structured information about parameters or effects.

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?

Although the tool has only one parameter and an output schema, the description fails to explain the parameter's role, the consequences of the action, or when to use the tool. This leaves the agent without enough context to invoke it safely or correctly.

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 input schema defines one required parameter, session_id, with no description. The tool description does not mention this parameter or explain how it affects the clearing action, so there is no compensation for the 0% schema coverage.

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 uses a clear verb 'clear' and identifies the resource as 'the entire session', making the core action understandable. While there are sibling session-management tools, none explicitly clear a session, so it is adequately distinguished.

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 no guidance on when this tool should be used, what prerequisites exist, or how it relates to alternatives like start_session or get_session_state. It merely states the action without context.

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