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test_form_validation

Audit a page's form validation: locate forms, list required fields, and collect error messages from invalid fields and custom error elements to verify client-side validation.

Instructions

Audit a page's form validation: locate forms, list their required fields, and collect messages from :invalid fields and custom error elements. Returns the per-form field/validation details. Use to verify client-side validation behaves as intended. Works on a session or a URL.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
urlNoURL to test (use this or session_id)
projectNoProject name (optional). With a project: runs in its shared, authenticated context. Without: runs in an isolated context (no shared cookies/login).
session_idNoSession ID (use this or url)
form_selectorNoCSS selector to target specific form(s) (default: 'form')
Behavior4/5

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

With no annotations, the description fully covers behavior: locate forms, list required fields, collect messages, and return details. It implies read-only audit without side effects.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three sentences front-load the purpose, action, return, and use case. No redundancy or filler.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a tool with no output schema, the description adequately describes return type and usage. It could be more complete with error handling, but overall sufficient.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% and includes detailed parameter explanations. The tool description adds no new parameter semantics beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool audits form validation, lists required fields, and collects error messages. It distinguishes itself from sibling tools like auto_fill_form and fill_form by focusing on audit rather than filling.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description says 'Use to verify client-side validation behaves as intended,' providing clear context. However, it does not explicitly mention when not to use or alternative tools.

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

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