input_type

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

The annotations only declare readOnlyHint=false, so the description carries real weight and does add genuine behavioral detail: pacing to avoid the 8-slot i8042 buffer overflowing, and a supported-character restriction (printable ASCII, common symbols, US layout). It stops short of saying what happens on unsupported characters, whether it blocks until completion, or what the call returns.

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 short sentences, front-loaded with the action, followed by the mechanism and the input constraint. No filler or restatement of the tool name.

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 two-parameter input tool with no output schema and minimal annotations, the description is nearly sufficient: what it types, how it paces, and what characters are valid. It omits only operational context such as which session receives the input and any failure behavior, which are minor gaps.

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 the baseline is 3, but the description adds meaning the schema does not: the US-layout printable-ASCII constraint on 'text' and the rationale for 'cps' (pacing to protect the keyboard buffer). That is useful semantic enrichment over the raw field descriptions.

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?

States a specific verb and target: 'Type a string on the DOS keyboard,' which is clearly a text-injection action rather than a read or query. It does not, however, differentiate itself from the sibling tools input_key (single key) and input_sequence, so an agent must infer the boundary between typing a string versus pressing keys.

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?

Usage is implied by the verb (type literal text into DOS), but there is no explicit when-to-use statement or routing against input_key or input_sequence, which are the obvious alternatives for keyboard input. No prerequisites or session/focus requirements are mentioned.

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