create_agent

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

With no annotations, the description carries the full burden, but it only states the creation action and visibility advice. It does not disclose side effects, permission requirements, reversibility, or any runtime-specific behavior, leaving the agent to infer these from the schema alone.

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, consisting of two short sentences. The primary action is front-loaded, and the visibility recommendation is a valuable addition. No filler or redundant phrasing exists.

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 tool with 8 parameters, no output schema, and no annotations, the description is insufficiently detailed. It omits essential context such as return values, required fields beyond runtime_id, how model is selected, and any prerequisites. The single visibility hint is helpful but leaves major 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 coverage is only 25% (2 of 8 params have descriptions). The description adds guidance for the visibility parameter ('workspace' recommended), but provides no semantic context for name, model, instructions, max_concurrent_tasks, or workspace_id, which are otherwise undocumented. This does not sufficiently compensate for the low schema 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?

The description clearly states the action ('Create an agent') and the target context ('on a runtime'), which is specific and actionable. However, it does not explicitly distinguish this from sibling tools like create_agent_from_template, though the 'on a runtime' qualifier provides some implicit differentiation.

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 best-practice directive ('Use visibility 'workspace' so all members can use it'), but gives no guidance on when to choose this tool over alternatives such as create_agent_from_template or update_agent. No exclusions or selection criteria are provided.

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