make_call

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It only states that it 'initiates a phone call' but does not disclose what happens after initiation (e.g., whether the call is synchronous, whether it returns a call ID for later status checks, whether it triggers charges, or any side effects). Since siblings include get_call_status and get_call_recording, an agent would likely need to know that make_call returns a call identifier, but this is not mentioned. The description offers no behavior beyond the primary action, leaving significant gaps.

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, concise sentence that immediately states the action and platform. It is front-loaded and contains no redundancy or fluff. It earns a 4 because it is efficient and to the point, though it lacks any structural enhancements like bullet points or clarifications, which might be helpful but are not required for this simplicity.

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?

This tool has no output schema, no annotations, and only two simple string parameters, so the description must explain the return behavior. It does not state what the tool returns (e.g., a call ID) or any side effects (e.g., charging, scheduling). Given that siblings like get_call_status and get_call_recording likely rely on a call ID from this tool, the absence of such information makes the description incomplete for an agent that needs to chain calls. The description is too sparse to fully support correct usage.

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%: both 'from' and 'to' have descriptive names ('Номер вызываемого абонента' and 'Номер звонящего') that fully explain their meaning. The description adds no extra commentary about the parameters, so it relies on the schema. Since the baseline for high coverage is 3, this is appropriate; the description does not need to repeat what the schema already provides.

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 states a specific verb ('initiate'), a clear resource ('a phone call'), and the platform ('MTS Exolve'). This unambiguously distinguishes it from siblings like send_sms or send_viber_message, which target different communication channels. The agent can tell exactly what this tool does without opening its schema.

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 usage context is implied by the name and the sibling set: it is the only tool that makes calls, so an agent would infer to use it for placing a voice call. However, there is no explicit guidance on when to prefer it over alternatives (e.g., for SMS or Viber), no mention of prerequisites like account permissions, and no exclusions. The lack of any explicit 'use when...' statement keeps this at an implied level rather than a clear directive.

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