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

Annotations already carry destructiveHint=true and readOnlyHint=false, and the description reinforces deletion. It also discloses the required certs:manage scope and warns that billing/rate limits apply, which goes beyond the annotations. It does not elaborate on irreversibility or cascading effects, but that burden is largely covered by the annotations.

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 opening sentence repeats the title almost verbatim ('Delete a certificate' / 'Deletes a certificate.'), which wastes a sentence. The remaining bullets are compact and relevant, but the redundancy keeps it from being a top-tier concise description.

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 low-complexity delete operation, the description supplies the endpoint, required scope, and API behavior, while the schema explains the parameters and annotations cover destructiveness. A minor gap is lack of any mention of the response or prerequisites, but this is not critical here.

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 100%, so the baseline is 3. The description adds that id is placed in the /manage-certs/{id} path, but it does not explain the x_app_id override behavior; the schema already covers both parameters adequately.

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 action and resource ('Delete a certificate') and pins it to a concrete OpenAPI operation and path (DELETE /manage-certs/{id}). Among sibling delete tools, the resource name cleanly separates this from deleteApiKey, deleteApp, deleteTemplate, etc.

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 intended use is implied: use it when a certificate must be removed, and the API mapping and scope indicate this is the real hosted endpoint. However, it never explicitly states when not to use it or compares it with related certificate tools such as listCertificates, uploadCertificate, or testAppleCertificates.

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