batch_modify_messages

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

Lacks disclosure of behavioral traits such as permissions required, destructive nature, rate limits, or side effects. No annotations provided to compensate.

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 concise sentences, front-loaded with purpose. Could be more structured but is efficient.

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?

Incomplete given 5 parameters, no output schema, and no annotations. Lacks return value description, error handling, authentication context, and parameter details.

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?

Only mentions that add_labels/remove_labels accept label names or ids; does not explain message_ids, account, password, or default behaviors. Schema description coverage is 0%.

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?

Clearly states the tool adds/removes labels across many messages in one call, distinguishing it from siblings like label_message and unlabel_message which operate on single messages.

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?

Implies use for batch labeling, but does not explicitly state when to use versus alternatives or exclude cases like single-message operations.

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