type_text

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

With no annotations, the description must fully disclose behavior. It only mentions correct space handling, but omits key details like whether it types at the cursor position, how it handles special characters, or what happens if the device is disconnected. This is insufficient for an agent to safely invoke the tool.

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 of 12 words with no redundancy. It is extremely concise, but the brevity sacrifices necessary detail. Nonetheless, it is efficiently structured for a minimal tool.

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 tool with one parameter and no output schema, the description is too sparse. It lacks information about connectivity requirements, error handling, and whether the text is appended or replaces existing content. The presence of sibling tools with similar names suggests more context is needed to avoid confusion.

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 add meaning to the 'text' parameter. It only confirms the parameter is the text to type, but adds no format constraints, encoding details, or length limits. The statement about spaces is a behavioral trait, not a semantic addition.

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 types text on a connected Android device, using a specific verb and resource. It distinguishes from siblings like 'clear_and_type_text' and 'replace_text' by implying it only types without clearing or replacing, and adds a specific behavior about handling spaces correctly.

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 on when to use this tool versus alternatives such as 'clear_and_type_text' (which clears existing text first) or 'replace_text' (which replaces selected text). The description does not mention prerequisites like device focus or input field state.

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