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

The annotations already flag destructiveHint=true and readOnlyHint=false, but the description adds genuine behavioral context beyond them: deletion cascades to the source video and the captioned output, not just the job record. It stops short of covering failure modes, such as what happens to a job that is still running or whether the upload is recoverable.

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?

A single front-loaded sentence with zero filler, and the irreversible nature plus cascade scope arrive before an agent has to decide. Nothing needs to be trimmed.

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?

For a one-parameter destructive tool with no output schema, the description covers the crucial data-loss scope, which is the most important thing. It is still incomplete on the input's provenance and on post-conditions (return value, behavior for in-flight jobs), which an agent needs before committing to an irreversible call.

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 0%, so the description must carry the burden for job_id and it does not mention the parameter at all. It never says where a job_id comes from (presumably list_caption_jobs or create_caption_job) or what an invalid id does, leaving the only input entirely unexplained.

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 ('permanently delete') and resource ('a job'), and adds the scope of what is removed: the source video and the captioned output. No sibling tool performs deletion, so the description alone separates it from get_caption_job, list_caption_jobs, and the create/start/wait lifecycle tools.

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?

Usage is implied rather than stated: an agent can infer this is the tool for removing an existing caption job, and 'permanently' signals caution. However, there is no guidance on prerequisites (e.g., whether the job must be completed, or that the job_id comes from list_caption_jobs) and no explicit when-not-to-use statement.

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