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

No annotations are provided, so the description carries full burden. It mentions the local path behavior (appended to localhost:5000), which is useful, but doesn't disclose critical behavioral traits like what the tests actually do, whether they're destructive, what permissions are needed, rate limits, or output format. This leaves significant gaps for an agent.

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, efficient sentence that front-loads the core purpose and includes essential details without any wasted words. Every element serves a clear purpose in conveying the tool's functionality.

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 annotations and no output schema, the description is incomplete for a testing tool. It doesn't explain what accessibility tests are run, what the results look like, error conditions, or behavioral constraints. This leaves the agent with insufficient context to use the tool effectively.

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 100%, so the schema already documents both parameters fully. The description adds marginal value by clarifying the local path behavior (appended to localhost:5000), but doesn't provide additional syntax, format details, or usage examples beyond what the schema states.

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 the specific action ('Run accessibility tests') and the target resources ('on a URL or a local path'), with no siblings to distinguish from. It uses precise verbs and identifies the exact scope of operation.

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 implies usage context by specifying the two input types (URL or local path), but doesn't provide explicit guidance on when to choose one over the other or mention any prerequisites. With no sibling tools, this is adequate but lacks detailed decision criteria.

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