take_snapshot

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

Annotations have readOnlyHint=false, and the description adds behavioral context: uses a11y tree, lists elements with uid, indicates selected element in DevTools. However, it does not disclose any side effects beyond the optional save-to-file. No contradiction with annotations.

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?

Three sentences, all front-loaded with core action and key details. No redundant information; every sentence adds value.

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?

While the description outlines what the snapshot contains, it does not explain the return format or how the agent should use the uid or snapshot data. With no output schema, more detail on the response structure would be helpful.

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 coverage is 100%, so baseline is 3. The description does not add new meaning beyond what the schema provides for 'verbose' and 'filePath'. It mentions using latest snapshot, which is not a parameter.

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 tool takes a text snapshot of the currently selected page using the a11y tree, listing elements with unique identifiers. It distinguishes from the sibling tool 'take_screenshot' by explicitly stating preference for snapshot over screenshot.

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?

Provides guidance to always use the latest snapshot and prefer snapshot over screenshot, but does not explicitly state when not to use this tool or mention alternative tools like 'evaluate_script' for similar tasks. Could be more comprehensive.

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