add_contacts_to_sequence

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

No annotations provided, so description carries full burden. Mentions contacts will start receiving emails, but does not disclose side effects (e.g., what happens if contacts already in sequence? No mention of idempotency or failure modes). The 'FREE' tag is useful but not sufficient.

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?

Three sentences, efficient. 'FREE' is slightly out of place but not detrimental. No excess verbosity.

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?

Covers main operation and key required parameters, but lacks details on success/error behavior, rate limits, or handling of optional parameters. Output schema absent increases need for more context.

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 coverage is 100% with descriptions. Description reinforces requirement for email_account_id but adds little new meaning beyond schema.

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?

Clear verb-resource combination ('Add contacts to an email sequence'). Specifies inputs needed (sequence ID, contact IDs). Does not explicitly differentiate from sibling tools, but the action is unique.

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?

States when to use (adding contacts to a sequence) and required parameters, but no explicit 'when not to use' or alternatives. Sibling tools do not include similar functionality.

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