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CallMCP — Phone Call MCP Server

Delete Webhook

delete_webhook
DestructiveIdempotent

Remove a business outbound webhook by ID.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "id": "<id>"
    },
    "name": "delete_webhook"
  }
}

Input Schema

NameRequiredDescriptionDefault
idYesWebhook ID to remove.
business_idNoBusiness ID (optional only when the token can access exactly one business).

Output Schema

NameRequiredDescriptionDefault
errorNoPresent when success is false
messageNo
successYesWhether the tool completed successfully
business_idNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

B3.2/5.0
Behavior3/5

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

Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false, so the agent knows the safety profile without the description. The description adds the qualifier that the target is a 'business outbound' webhook, but says nothing about irreversibility, the effect on in-flight deliveries, or behavior when the ID does not exist.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

A single short sentence with no filler, and the identifying detail (by ID) is front-loaded. It is perhaps slightly too terse given the destructive nature of the call, but every word earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists, so return values need not be described, and annotations cover the destructive/idempotent profile. However, for a mutation that cannot be undone, the absence of any note on consequences or on the optional business_id scoping leaves the definition only minimally complete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% and both parameters are documented inline, including the conditional rule for business_id. The description's 'by ID' wording merely restates the id parameter and adds no format or constraint details beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description gives a specific verb plus resource ('Remove a business outbound webhook') and notes selection is by ID, which is unambiguous. It does not distinguish itself from the sibling tools get_webhook, set_webhook, or request_transcript_webhook, so it stops short of a 5.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

There is no statement of when to use this versus get_webhook or set_webhook, and no prerequisites or exclusions. The only implied guidance is that an ID is required, which is already visible in the schema.

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

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