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

No annotations are provided, so the description carries full burden. It discloses the write nature and approval tier, but lacks details on side effects (e.g., overwriting behavior), required permissions, or response format. The approval note adds some value, but other behavioral traits are missing.

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 extremely concise: two sentences, front-loaded with the core purpose, and the approval note in brackets adds necessary context without verbosity. Every sentence earns its place.

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 write tool with no output schema, the description provides the essential purpose and approval information. However, it does not explain return values, behavioral constraints (e.g., cell limits), or how updates affect existing data, leaving 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 description coverage is 100%, so all parameters are documented in the schema. The description does not add additional meaning beyond the schema, hence baseline score of 3 is appropriate.

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 'Update specific cells in a Google Spreadsheet,' which is a specific verb+resource combination. It distinguishes from siblings like append_to_sheet (which appends rather than updates specific cells) and read_sheet (read-only).

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 includes a write-tier approval note that informs when the tool should be used (write operations) and approval requirements. However, it does not explicitly exclude scenarios or compare to alternatives like batch_update_spreadsheet.

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