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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description earns credit by disclosing the response shape (parent, permissions, direct subfolders), which is valuable since no output schema exists, though it omits error behavior and depth/recursion semantics.

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 short sentences, front-loaded with the payload description. The trailing 'Formstack: GET /folders/{folderId}' line is mild filler but does give an endpoint mapping.

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 single-parameter read tool with no output schema, the description covers what the call returns, which is the main information gap. It stops short of explaining nested subfolder depth or failure modes, but nothing essential is missing.

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% for the single folder_id parameter, so the schema already documents it fully. The description repeats folderId only via the REST path template and adds no syntax, range, or lookup guidance beyond the schema.

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 (Fetch) and resource (a folder) and goes further by naming what comes back: parent, permissions and direct subfolders. This distinguishes it from formstack_list_folders implicitly, but never names that sibling explicitly.

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 only implied: a single-folder-by-ID retrieval, which naturally contrasts with the list tool. There is no explicit when-to-use statement, no mention of the list alternative, and no note on what happens if the folder is missing.

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