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

With no annotations provided, the description carries the burden of behavioral disclosure. It adds useful constraints (Pro feature, API key) but does not explain what happens on creation (e.g., if a folder with the same name causes an error) or the return value. It fails to disclose critical side effects or success/failure behavior.

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 highly concise, with the main action front-loaded in the first sentence and the constraints in the second. Every word earns its place with no redundant or vague phrasing.

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 mutation tool with only two parameters, the description covers purpose and prerequisites but is missing key contextual details like the return value (folder ID or object) and any error conditions. Since there is no output schema, the description should have provided at least a hint about the expected output.

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?

The input schema already provides 100% coverage with descriptions for both parameters (name and parentFolderId). The description adds no additional parameter-specific meaning beyond the schema, so the baseline of 3 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?

The description states the specific verb and resource: 'Create a Drive folder to organize diagrams.' This clearly distinguishes it from sibling tools like create_diagram or delete_diagram. It also adds relevant constraints (Pro feature, API key) that further clarify the tool's scope.

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 gives clear context for when to use the tool (to organize diagrams) and mentions prerequisites (Pro feature, API key). However, it does not explicitly mention alternatives or when not to use it, such as noting that list_folders should be used to view existing folders or that move_diagram is for relocating diagrams.

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