Set Drive File Permissions

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

Annotations already declare destructiveHint=true, readOnlyHint=false, so the agent knows this is a mutating operation. The description adds no extra behavioral context (e.g., what exactly gets destroyed, auth requirements, or side effects on existing permissions). With annotations covering the safety profile, this is acceptable but not enriched.

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 concise and well-structured. It front-loads the primary purpose in the first sentence, then clarifies scope and provides alternatives in the following sentences. No unnecessary information is present.

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?

The tool has an output schema and comprehensive parameter schema, so the description does not need to explain return values. The description covers purpose and usage clearly, making it complete for the tool's complexity.

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 100%, with all 5 parameters clearly documented. The description itself does not explain parameters but relies on the schema, which is fully sufficient. This meets the baseline for high coverage.

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's function with a specific verb and resource: 'Sets file-level sharing settings and controls link sharing for a Google Drive file or folder.' It also distinguishes from siblings by explicitly mentioning individual user/group permission management as separate.

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 provides explicit when-to-use guidance ('Use this to toggle "anyone with the link" access') and names alternatives ('use share_drive_file or update_drive_permission instead'). However, the referenced alternatives are not present in the given sibling-tools list, which may mislead an agent into calling unavailable tools.

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