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

Annotations already declare destructiveHint=true and readOnlyHint=false, so the safety profile is covered structurally. The description adds concrete consequence detail beyond the annotations: the deletion is permanent and the video file is erased. It omits auth requirements and failure behavior, so it falls short of a 5.

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 sentences with zero filler; the permanence consequence and the confirmation requirement are both front-loaded. Every sentence carries information an agent needs.

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?

An output schema exists, so return values need not be explained, and annotations cover destructiveness. The description supplies the remaining critical facts (irreversibility, confirmation requirement) for a destructive two-parameter tool, though it says nothing about what happens on a false confirm or missing clipId.

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 description coverage is 50%: 'confirm' is documented in the schema but 'clipId' has no description anywhere. The description reinforces that confirmation is explicit and required, adding minor value, but it does not compensate for the undocumented clipId parameter (format, source of the id). Baseline 3 is appropriate given partial 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?

States a specific verb and resource ('deletes a clip') plus scope beyond the name ('and its video file'), which lets an agent distinguish it from get_clip, list_clips, and update_clip. It does not explicitly name a sibling, but the destructive verb makes the boundary obvious without opening schemas.

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 states a prerequisite ('Requires an explicit confirmation argument'), which is genuine usage guidance. However, it gives no when-to-use/when-not context versus siblings like update_clip or cancel_scheduled_post, and does not explain when deletion is appropriate. Guidance is implied by the destructive verb only.

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