Uncheck checkbox

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

No annotations are provided, so the description carries the full burden. It discloses that the tool is a no-op if already unchecked, which is useful behavior. However, it doesn't state any side effects like waiting for the action to complete, what happens if the element is not found, or if it triggers any events like 'change'. For a mutation tool, this is some but not full disclosure.

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, concise sentence that states the action and the no-op behavior. It is front-loaded with the core purpose and adds the no-op detail efficiently. No extra words, though it could incorporate more usage guidance, but as it stands it's concise.

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 the complexity of the 'target' parameter with its anyOf structures, the schema handles that well. The tool's behavior is simple, and the description covers the main purpose and no-op case. However, for a mutation tool with no annotations, it might be expected to mention what happens on failure or whether it waits for navigation, but overall it's adequate for an agent to call it, especially considering the schema richness.

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?

The schema has 100% description coverage, so all parameters are documented in the schema. The description adds nothing about parameters. The 'target' parameter description in the schema is comprehensive, including examples, so the baseline is 3. The description doesn't need to add more, but it also doesn't exceed the baseline.

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 action: it unchecks a checkbox in the session page, and also specifies it's a no-op if already unchecked. This differentiates it from its sibling 'check', which does the opposite. However, it doesn't explicitly mention that it is a mutation, but the verb 'unchecks' implies that clearly.

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 gives context: it acts on the session page and is a no-op if already unchecked, which hints at when to use it (when a checkbox should be unchecked). However, it doesn't explicitly mention its opposite 'check' as the alternative for checking, nor does it provide explicit conditions for when to prefer one over the other. The sibling name is visible, so the agent can infer.

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