fill_form_by_uid

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

No annotations exist, so the description must fully convey behavioral traits. It only says 'Fill' which implies mutation but does not disclose side effects (e.g., triggers events, requires focus, blocks on completion) or safety considerations. Critical behavioral context is missing.

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 extremely concise (4 words). While not wasteful, it omits essential details. For a tool with one parameter and no annotations, conciseness should not sacrifice informativeness. A score of 3 reflects minimal adequate length.

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 no output schema, no annotations, and the complexity of form filling (e.g., UID resolution, field types, error handling), the description is insufficient. It lacks information on return value, success/failure indicators, and any prerequisites. The completeness is low.

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 one parameter 'elements' (array of {uid, value}). The description adds the notion of 'multiple fields at once', which is implicit in the array type. This adds marginal value beyond the schema, justifying a baseline 3.

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 states the action (fill), resource (form fields), and scope (multiple). The name 'fill_form_by_uid' combined with the description distinguishes it from siblings like 'fill_by_uid' (single field). The verb 'fill' is specific to form inputs.

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?

No guidance on when to use this tool versus alternatives such as 'fill_by_uid' for single fields. No prerequisites (e.g., page loaded, field visible) or exclusions are mentioned. The description provides no context for choosing this tool.

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