takeScreenshot

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

The annotations already declare this a safe, idempotent, non-destructive read operation with openWorld behavior. The description adds genuine context beyond them — it requires a trusted owner and an interactive desktop session — which an agent needs to know before calling. It stops short of describing failure modes or what happens when no interactive desktop exists.

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?

Two short sentences, prerequisite front-loaded after the identifying clause, zero padding. Slightly redundant in restating the tool name, but appropriately sized for the content it chooses to convey.

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?

No output schema, six undocumented parameters, and no mention of return format (path? bytes? image handle?). For a tool with 0% schema description coverage, the description should carry far more burden than two sentences about the environment.

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?

Six parameters with 0% schema description coverage and no parameter information in the description at all. The names (x, y, width, height, target, windowTitle) are largely self-explanatory and the target enum is self-documenting, which prevents a 1, but the description does nothing to clarify how region coordinates interact with target or when windowTitle applies.

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?

"takeScreenshot" is a specific verb+resource, and "Windows AutoIt" adds platform context. It is clearly distinguishable from all siblings, none of which capture screens. It does not, however, say what is captured (screen, window, region) — that is left entirely to the schema.

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 states an environment prerequisite (trusted owner, interactive Windows x64 desktop) but gives no when-to-use guidance, no exclusions, and no routing to alternatives. Since no sibling captures screenshots, the omission is less costly, but it is still absent.

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