sleeper_fill_form

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

With no annotations, the description carries full behavioral burden. It does not disclose side effects (e.g., whether filling triggers events or submits), error handling, or any post-conditions. Only the targeting mechanism is mentioned, leaving most behavioral traits opaque.

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, front-loaded phrase with no wasted words. Yet it is arguably too terse for a tool with a nested object parameter, risking under-specification that could be mistaken for conciseness.

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 absence of annotations, output schema, and full parameter documentation, the description is insufficient. It does not explain return values, side effects, or how to handle partial failures, leaving significant gaps for safe invocation.

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 only 33% (only 'profile' documented). The description adds meaning for the required 'fields' parameter by indicating it is a JSON map keyed by name/id/placeholder, which partially compensates. However, 'tab' remains undocumented and no further syntax or value format is provided.

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 ('Fill') and resource ('form') and specifies how fields are targeted ('by name/id/placeholder'), making the purpose clear. However, it does not distinguish itself from siblings like sleeper_type or sleeper_submit, so an agent must infer that this tool fills multiple fields at once rather than typing into a single element.

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 when-to-use guidance, prerequisites, or alternatives are provided. The description does not mention when to prefer this over sleeper_type or how it relates to sleeper_submit. Usage is only implied by the verb 'Fill'.

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