createAgent

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

Discloses that voicemail detection is access-gated and requires per-account enablement, which is a behavioral trait not covered by annotations. Does not mention other side effects or limitations.

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?

Concise and well-structured: a clear opening sentence, a summary of capabilities, and a focused note on voicemail access. No redundant information.

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 create operation with a large nested schema, the description provides a useful overview and highlights the key access caveat. However, it does not mention the return value or potential errors, but the schema itself is very detailed.

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 description gives a high-level summary of supported features but does not add meaningful detail beyond the already extensive parameter descriptions in the schema, which has 100% coverage.

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 it creates a new agent with configuration, and lists the key capabilities. Distinguishes from sibling tools like updateAgent and deleteAgent.

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?

Implicitly indicates when to use (to create an agent) and provides a specific usage note about voicemail access-gating, but lacks explicit comparisons to alternative tools.

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