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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds real value beyond that by describing the returned payload shape and the practical meaning of the field names (they are the keys for prefilled answers), plus the underlying endpoint.

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 compact sentences with the payload contents front-loaded, followed by the identifier requirement. The trailing 'GET /screen/form.' is a slightly dangling technical detail, but nothing is padded.

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?

No output schema exists, and the description compensates by sketching the return shape (name, version, status, typed fields). Minor gaps remain: it doesn't say how status/version interact with the id lookup or what happens when the form is not found.

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 100%, so the baseline is 3. The description still adds meaning the schema cannot express: it frames id and external_id as an either/or identifier choice, whereas the schema marks all four params optional with no anyOf, leaving the selection rule undocumented.

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?

Names a specific verb+resource ('One form's definition') and enumerates what it contains (name, version, status, fields with names and types). This clearly separates it from list_forms, which is the collection-level sibling.

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 implies usage ('Give the form's id (GUID) or its external id' and hints the field names feed prefilled answers), but it never states when to prefer this over formsonfire_list_forms or another sibling, nor any exclusion or prerequisite.

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