wavexis_iframe_fill

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

The description 'Fill an input element' implies mutation, which aligns with annotations (destructiveHint=true, readOnlyHint=false). However, it does not disclose additional behavioral traits such as error handling when the element is not found, whether the action is idempotent, or any side effects beyond the annotation hints.

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 very short and front-loaded with the core purpose. It avoids unnecessary words. However, it could benefit from a slightly more structured format, such as listing prerequisites or constraints, to improve readability without significantly increasing 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?

For a tool with 4 required parameters and an output schema (just 'ok' status), the description lacks contextual completeness. It does not mention that session_id is required, nor does it describe return behavior when the input is not found, or any constraints like the need for the iframe to be already loaded. The simplicity of the tool is not an excuse for missing context.

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?

The description lists the parameter names (iframe_selector, selector, value) in a summary, but the input schema already provides detailed descriptions for each. With schema description coverage effectively high (parameters are described), the description adds minimal additional meaning. A baseline of 3 is appropriate.

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 clearly states that the tool fills an input element inside an iframe, which is a specific verb+resource combination. However, it does not differentiate itself from sibling tools like wavexis_iframe_click or wavexis_iframe_eval, missing an opportunity to clarify its unique function.

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 provides no guidance on when to use this tool versus alternatives. For example, it does not mention that this tool is specifically for filling inputs inside iframes, whereas wavexis_fill is for outside iframes. A clear usage context is absent.

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