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Changes state - verify before retry Links an organization phone number to an agent for inbound or outbound calls. Takes effect immediately for every version of the agent. Refused when the agent has no published version, already has 3 numbers in that direction, the number is linked to another agent in that direction (unless move is true), or a default number is used for inbound. With move, the number is taken off its current agent in the same step; confirm with the user first, since that agent stops using it, and it is refused while the number has live calls, an unfinished batch, or an active workflow there. Get phone number IDs from list_organization_phone_numbers.

Parameters

Complete input schema

Registered output schema

Before you call

  • Connect and initialize the MCP client with OAuth or an API key for the intended workspace.
  • Provide the required parameters: agent_id, phone_number_id, direction.
  • If your OAuth grant covers several workspaces, also pass organization_id with the workspace to act in, from List My Organizations.

Example MCP request

Send tools/call after your client completes MCP initialization. Replace placeholder values with IDs and inputs from your workspace. For object and array parameters, follow the nested requirements in the parameter description instead of treating an empty value as complete.
Successful results include structuredContent and a text content block containing the same JSON. Check isError first, then read structuredContent or parse content[0].text. See MCP responses and errors for the full envelope and failure behavior.

Verify the result

Confirm the response is not marked isError. Call List Agent Phone Numbers to read the affected resource. Verify that the intended state is visible before making another change.

Retry safety

This tool changes workspace state. After a timeout, read the affected resource before retrying so you do not create duplicate or conflicting changes.