fill_form_by_uid

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

Annotations already indicate readOnlyHint=false, and the description adds no behavioral detail beyond the purpose. It does not mention side effects, failure behavior, or requirements (e.g., fields must exist), so it provides little extra transparency beyond the structured annotation.

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 description is a single, concise sentence with the verb and object front-loaded. It contains no wasted words, though it could include a brief note about using it for multiple fields. It is appropriately short for a simple tool.

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?

Given the tool's simplicity (one parameter, 100% schema coverage, no output schema), the description adequately conveys what it does. The combination of description and schema provides sufficient context for an agent to invoke it correctly, though it lacks explicit linkage to the single-field sibling.

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%, with the 'elements' array and its 'uid'/'value' fields fully documented in the schema. The description adds only the notion of 'multiple fields', which is already implied by the array structure, so it does not meaningfully augment 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?

The description 'Fill multiple form fields at once' clearly identifies the verb ('fill'), resource ('form fields'), and scope ('multiple', 'at once'). It distinguishes from sibling tool fill_by_uid, which likely handles a single field, by emphasizing the batch nature.

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 phrase 'at once' implies the tool's use for batch form filling, but there is no explicit guidance on when to choose this over fill_by_uid or any exclusions. The usage context is merely implied, not stated.

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