Function callMCPTool

common/src/mcp/client.ts:148–197

(
  clientId: string,
  ...args: Parameters<typeof Client.prototype.callTool>
)

}

export async function callMCPTool(
  clientId: string,
  ...args: Parameters<typeof Client.prototype.callTool>
): Promise<ToolResultOutput[]> {
  const client = runningClients[clientId]
  if (!client) {
    throw new Error(`callTool: client not found with id: ${clientId}`)
  }
  const callResult = await client.callTool(...args)
  const result = callResult as CallToolResult
  const content = result.content

  return content.map((c: (typeof content)[number]) => {
    if (c.type === 'text') {
      return {
        type: 'json',
        value: c.text,
      } satisfies ToolResultOutput
    }
    if (c.type === 'audio') {
      return {
        type: 'media',
        data: c.data,
        mediaType: c.mimeType,
      } satisfies ToolResultOutput
    }
    if (c.type === 'image') {
      return {
        type: 'media',
        data: c.data,
        mediaType: c.mimeType,
      } satisfies ToolResultOutput
    }
    if (c.type === 'resource') {
      return {
        type: 'media',
        data: getResourceData(c.resource),
        mediaType: c.resource.mimeType ?? 'text/plain',
      } satisfies ToolResultOutput
    }
    const fallbackValue =
      'uri' in c && typeof (c as { uri: unknown }).uri === 'string'
        ? (c as { uri: string }).uri
        : JSON.stringify(c)
    return {
      type: 'json',
      value: fallbackValue,
    } satisfies ToolResultOutput
  })
}