session_delete

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

Annotations are absent, so the description carries full burden. It discloses permanence and the running session restriction, but lacks details on side effects, permission requirements, or irreversibility beyond 'permanently'. Adequate but not rich.

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 two sentences with no extraneous text. It front-loads the core action and adds a critical constraint. Every sentence provides essential information.

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?

The tool has an output schema, so return values may be covered there. However, for a destructive tool, the description could mention confirmation behavior or idempotency. It is adequate but missing parameter details, making it somewhat incomplete.

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 0% schema description coverage, the description should compensate but does not. It offers no guidance on the session_id parameter, such as format, origin, or how to obtain a valid ID. The description solely describes the action without parameter context.

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 the tool's action: permanently delete a session including history and sandbox. It also distinguishes from siblings by mentioning the constraint against running sessions, which differentiates it from session_archive or session_interrupt.

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 explicitly says 'Cannot delete a running session,' providing a clear when-not-to-use condition. However, it does not discuss alternatives like session_archive for archiving instead of deleting, which would improve guidance.

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