audit_url

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

With no annotations provided, the description carries full behavioral disclosure. It states it returns structured, conversational results with prioritized issues and fix suggestions, which is informative. However, it does not explicitly state that the operation is read-only or describe any limitations (e.g., handling of invalid URLs, network dependency), though these are not contradictory.

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 two sentences, front-loads the action, and provides useful output details without filler. It earns a top score for efficiency.

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 six parameters and no output schema or annotations, the description is slightly thin but adequate. It explains the purpose and output format, but could mention additional behaviors like handling relative paths or engine selection, though the schema covers these. A score of 3 reflects a minimally complete description.

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?

All six parameters have schema descriptions (100% coverage), so the schema carries the parameter details. The description does not add further parameter semantics, but its mention of 'conversational results' hints at the output rather than the input, so a baseline score 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 uses a specific verb ('Test'), clarifies the resource ('a single URL'), and the intent ('accessibility issues'). It also differentiates from siblings like audit_multiple_urls by explicitly stating 'single URL'.

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 clear context: it's for testing a single URL, which implies use cases. However, it does not explicitly reference alternatives such as audit_multiple_urls for batch auditing or audit_with_session for session-based testing, so it misses an opportunity to draw contrasts.

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