update_marketing_sender

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

The description indicates the tool is mutating but does not disclose side effects, required permissions, rate limits, or reversibility. No annotations are provided to supplement this information.

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 very short, which is concise but omits essential details. The 'Mutating:' prefix provides helpful context but the overall structure lacks completeness.

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?

Given the tool has a nested parameter and no output schema, the description is insufficient. It fails to explain behavior on success/failure or the nature of the patch operation.

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?

With 100% schema coverage, the description adds no additional meaning beyond the schema. The parameters are adequately described in the schema, but the nested 'sender' object structure is not elaborated.

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 it updates a SendGrid Marketing sender identity, distinguishing it from create and delete operations. However, it does not specify which fields are modifiable.

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?

No guidance is provided on when to use this tool versus alternatives like creating or deleting a sender. No prerequisites or conditions are mentioned.

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