retell_create_web_call

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It does add useful information by stating that the call returns an access_token for the Retell Web SDK, which is a behavioral outcome. However, it omits details like permissions, side effects, or failure modes, so it's only partially transparent.

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 a single, compact sentence that is front-loaded with the action and resource. It includes the essential return value without any fluff, making it concise and effective.

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?

The tool has no output schema, so the description appropriately notes the return value (access_token), which is critical for the agent to know what to expect. It also covers the main purpose and differentiates from phone calls. Gaps remain around prerequisites or call lifecycle, but the description is reasonably complete for a simple create 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?

Schema coverage is 100%; all three parameters (agent_id, metadata, retell_llm_dynamic_variables) have descriptions in the schema. The description itself adds no parameter-specific detail beyond the schema, so it meets the baseline of 3.

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'), the resource ('browser-based web call'), and the key outcome ('Returns an access_token'). It also distinguishes from siblings like retell_create_phone_call by specifying 'browser-based', making the purpose 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?

The description implies usage context by emphasizing 'browser-based web call', which clearly separates it from the phone-call sibling tools. However, it doesn't explicitly state exclusions or when to prefer alternatives, so it falls short of a 5.

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