take_snapshot

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

No annotations are provided, so the description must carry the full burden of behavioral disclosure. It only mentions 'token-efficient', hinting at cost savings, but does not specify whether the tool is read-only, what side effects exist, or any required permissions. The absence of disclosure about mutability or state changes is a significant gap.

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 sentence with no wasted words. It is front-loaded with the core action and includes a parenthetical note about token efficiency. This is highly concise and easy to parse.

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 output schema, the description should clarify the return format of the accessibility tree (e.g., JSON, structured object). It also lacks mention of when the tool might fail, performance characteristics, or how the result relates to other tools. The 'token-efficient' hint is vague. Overall, the description is insufficient for complete understanding.

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?

There are no parameters, so the input schema is empty with 100% coverage. The description adds minimal meaning beyond the schema, but it implies the tool operates on the current page context. Since the schema already conveys the absence of parameters, the description does not need to add more.

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 states 'Get the accessibility tree of the current page', which is a specific verb and resource. It distinguishes from sibling 'take_screenshot' by focusing on the accessibility tree rather than a visual capture. However, it doesn't explain what the accessibility tree is, which may cause ambiguity for some agents.

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. It does not mention any prerequisites, restrictions, or situations where this tool is appropriate. Sibling tools like 'take_screenshot' exist, but no comparison is given.

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