quickCall

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

The description discloses that the call is immediate, one-way, outbound, and pre-generated via Kokoro TTS. However, there are no annotations to cover the tool's safety profile, and the description does not mention the external side effect of placing a real phone call, potential costs, irreversibility, or what happens after invocation.

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 short and front-loaded with the core action in the first sentence. The second sentence clarifies prerequisites. The third sentence, 'Mirrors the MCP quickCall tool,' is mildly redundant but not harmful.

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 low-complexity tool whose parameters are fully covered by the schema, the description provides enough to make a basic call. Missing pieces include when to choose this over sibling instant-call tools and what the caller should expect in return, especially since there is no output schema.

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 description coverage is 100%, so all four parameters are already documented. The description adds the useful clarification that only phone and message are required, which aligns with the schema's required list, but it does not add meaning beyond that.

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 uses a specific verb ('Place') and resource ('immediate one-way outbound call') and adds the qualifier 'voiced by Kokoro TTS (pre-generated)', which makes the action clear. It distinguishes from scheduled calls by saying 'immediate', but it does not explicitly differentiate from similar siblings like quickCallWithEdge or makeInstantCall.

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 statement 'Only a phone + message are needed' gives useful prerequisite context. However, there is no guidance on when to prefer this tool over alternatives such as quickCallWithEdge or makeInstantCall, and no exclusions or fallback conditions are provided.

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