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

Annotations already flag destructiveHint=true; the description earns credit by specifying exactly what gets destroyed ("overwrites the previous clipboard contents") and by clarifying scope ("does not itself paste or submit data"). It stops short of stating device availability/auth requirements or error behavior on an offline device.

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 sentences, front-loaded with the action and followed by the key behavioral caveat. No padding, though the second sentence bundles two ideas (overwrite, no paste) that could be slightly sharper.

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?

Output schema exists so return values need not be explained, the parameters are fully documented, and the description covers the essential safety caveat (overwrite) plus the non-paste semantics for an operation on a remote device. Enough for correct invocation.

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%, with both device and text fully documented in the schema, so baseline 3 applies. "user-authorized text" adds a mild constraint nuance but no format, size, or device-targeting detail beyond the schema.

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 (place text on the paired computer clipboard) plus the downstream goal (pasting into an application), which distinguishes it from pure input tools like type_text or keyboard. It doesn't name its nearest siblings clipboard_read/clipboard_clear, so sibling differentiation is only partial.

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?

"Use this to place user-authorized text..." gives an implied usage context and "does not itself paste or submit data" implicitly rules out pasting workflows. However, no alternative tool is named and there is no explicit when-not guidance, so selection versus clipboard_clear or type_text is left to inference.

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