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

Annotations already declare destructiveHint=true, idempotentHint=false, so the agent knows this mutates state irreversibly and is not safe to retry. The description adds genuine value by disclosing credential handling behavior (credentials never appear in URLs or error output) and the one-action-per-call constraint, but it never says what the submitted action does to the certification state or whether it can be undone.

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?

Three tight sentences with the core action front-loaded and no filler. The auth and credential-safety sentences earn their place, though the closing security note could be trimmed without loss.

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?

With no output schema and annotations covering only the safety profile, the description is adequate on authentication but incomplete for a destructive, non-idempotent submission tool: it does not describe the effect of the action, the meaning of revision (optimistic-concurrency check?), or the expected response.

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 only 25%, so the description must compensate, and it partially does by clarifying the credential parameter supports two provisioning modes and is a private per-version capability. However, id, revision, and especially the free-form 'action' object (typed only as a generic object) remain undocumented in both the schema and the description.

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 a specific verb and resource ('Submit one ... action'), but 'P4 action' is unexplained jargon and 'externally chosen' is ambiguous without domain knowledge. It never distinguishes itself from the close siblings submit_author_action and submit_play_action, so an agent must infer which submission channel applies.

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 only guidance is authentication mechanics: pass the credential argument or set the Authorization header. There is no statement of when to use this versus submit_author_action, submit_play_action, or submit_certification_report, and no prerequisites such as needing a pre-existing certification session.

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