close

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

The description adds the specific detail that the daemon is also terminated, which is beyond the annotations' destructive hint. However, it does not disclose side effects, reversibility, or return behavior. With annotations already indicating destructiveness, this partial additional context earns a middle score.

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?

Two short, front-loaded sentences with no filler. Every word earns its place, and the imperative 'Always close sessions when done' is a clear, useful addition without 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?

The tool is simple (1 param, no output schema), and the description covers the primary action and a usage guideline. However, it omits any mention of return values, potential errors, or what happens to unsaved data, which is relevant for a destructive operation. The presence of annotations helps but does not fully compensate.

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 one parameter 'sid' with no description (0% coverage), so the description must compensate. Yet the description does not mention 'sid', its purpose, format, or constraints. It is only inferable from tool context, but the description itself adds no semantic value.

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 specific verb ('terminate') and names the resource ('a session and its daemon'), clearly distinguishing it from sibling tools like list_sessions or start. It fully communicates the tool's core function.

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 instruction 'Always close sessions when done' provides clear context on when to use this tool. It does not explicitly name alternatives or exclusions, but the context is sufficient given the sibling tools and the lifecycle implied by 'close' versus 'start'.

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