Get free TLS certificate

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

Annotations already cover read-only/idempotent/non-destructive safety, and the description adds genuinely new behavioral context: the required scope (certificates:read) and the semantic warning that a queued request does not mean the certificate is issued. That warning is the kind of non-obvious trait an agent cannot derive from the schema or 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?

Three compact sentences, front-loaded with the verb and resource, and each clause (returned fields, issuance caveat, permission requirement) earns its place. No filler or restatement of the name/title.

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, enumerating the returned fields and the issuance-state caveat is exactly the right compensation, and the auth requirement covers the permission dimension. It falls short of 5 only because it does not mention failure modes (e.g., unknown or non-owned request ID) or confirm the ID's origin, which it leaves to the schema.

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?

There is a single parameter with 100% schema description coverage; the schema already documents the UUID and its pattern. The description adds no format or sourcing detail beyond noting ownership, so the baseline 3 applies.

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 gives a specific verb ('Read one') and resource ('owned no-cost certificate request') and enumerates the returned facets (public CA, renewal schedule, validation state), making it distinct from list_free_certificates and the eligibility/instruction siblings. It does not explicitly name those siblings, but the singular 'one owned ... request' framing differentiates adequately.

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?

It states a prerequisite ('Requires certificates:read') and a key interpretation caveat ('A queued request is not proof of issuance'), which implies when the tool is useful. However, it never says when to reach for this versus get_certificate, get_free_certificate_eligibility, or list_free_certificates, so the routing guidance is only implied.

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