type

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

The annotation destructiveHint=true already signals that this operation modifies state, so the description does not need to repeat that. However, the description adds no behavioral context beyond the annotation, such as whether typing overwrites existing content, appends, or triggers events. It neither contradicts the annotation nor enriches it.

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 zero filler. Every word contributes to the meaning, and it is immediately front-loaded with the verb and resource. This is an exemplary model of conciseness.

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?

For a simple two-parameter tool, the description covers the basic action but lacks usage context and any details on return values or side effects beyond the annotation. Given the presence of sibling tools and the absence of an output schema, more could be said about when to use it or what happens after typing, but the minimal description is sufficient for a straightforward action.

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 0%, so the description must carry the semantics. The sentence implicitly defines 'uid' as the element identifier and 'text' as the content to type, which is helpful given the property names. However, it does not explain formats, lengths, or any constraints, leaving gaps that an agent might need to know.

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 a clear verb ('Type') and resource ('text into the element identified by uid'). It distinguishes the tool's action from siblings like click, hover, or select, but does not explicitly name any alternatives. The purpose is unambiguous and directly maps to the tool's function.

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?

No guidance is provided on when to use this tool versus alternatives like 'press' or 'select'. There is no mention of context such as text input fields, event triggering, or when not to use it. An agent must infer usage from the tool name and description alone.

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