complete

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

With no annotations, the description carries full burden. It discloses the status change to 'complete' and persistence via session_load/list. However, it doesn't explicitly state irreversibility or side effects on branches.

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?

Every sentence adds value: action, status, usage condition, persistence info, and explicit don't-call advice. No fluff, well organized.

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 description is fairly complete for a simple tool, covering purpose, usage, behavior, and persistence. Minor gap: no mention of return value or confirmation, but no output schema exists.

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?

Schema coverage is 100% with clear description. The description adds no new meaning beyond the schema's 'Your final conclusion or answer', meeting the baseline for high 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 clearly states the action: 'Mark the thinking chain as complete with a final conclusion' and sets session status to 'complete'. It differentiates from siblings like 'think' (add thoughts) and 'session_save' (save without completion).

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?

Explicitly states when to use: 'when reasoning has reached a definitive answer', and when not: 'Do not call if you plan to continue thinking'. Also mentions the alternative of adding more thoughts, and notes session accessibility after.

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