Cancel a CLI auth challenge

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

The description adds 'Paperclip operation: POST /api/cli-auth/challenges/{id}/cancel. Authorization class: public.' This provides the HTTP method and auth requirement, which is useful. However, annotations already set destructiveHint=true, so the destructive nature is known. The description does not explain side effects (e.g., what happens to the challenge, whether it can be undone) or other behavioral traits beyond the annotation.

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 very concise at two sentences, which is positive for brevity. However, it sacrifices necessary detail for conciseness, especially regarding parameters. The structure is straightforward but could be improved by front-loading the most critical information about cancellation behavior.

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 complexity of the CLI auth challenge lifecycle (with siblings for create, approve, revoke), the description is incomplete. It does not explain what happens upon cancellation, what the output schema contains, or error conditions. The presence of an output schema and annotations somewhat compensates, but the description alone leaves significant gaps.

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 has two parameters (path.id and body.token) with no descriptions in the schema (0% coverage). The tool description fails to explain what these parameters represent or how they should be used. For example, it does not clarify that 'id' identifies the challenge or that 'token' is the authentication token. This leaves the agent guessing about parameter meaning.

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 states 'Cancel a CLI auth challenge' which clearly identifies the action and resource. The tool name and title align with this purpose. However, it does not explicitly distinguish from siblings like 'approve' or 'revoke', but the verb 'cancel' is distinct enough. A more detailed explanation of what a CLI auth challenge is would improve clarity.

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 provides no guidance on when to use this tool versus alternatives such as pc_post_cli_auth_challenges_by_id_approve or pc_post_cli_auth_revoke_current. No context, prerequisites, or exclusions are mentioned. The agent must infer usage from the name alone.

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