Function calculateDeferredToolDescriptionChars

src/utils/toolSearch.ts:342–367

* Calculate total deferred tool description size in characters. * Includes name, description text, and input schema to match what's actually sent to the API.

(
  tools: Tools,
  getToolPermissionContext: () => Promise<ToolPermissionContext>,
  agents: AgentDefinition[],
)

 * Includes name, description text, and input schema to match what's actually sent to the API.
 */
async function calculateDeferredToolDescriptionChars(
  tools: Tools,
  getToolPermissionContext: () => Promise<ToolPermissionContext>,
  agents: AgentDefinition[],
): Promise<number> {
  const deferredTools = tools.filter(t => isDeferredTool(t))
  if (deferredTools.length === 0) return 0

  const sizes = await Promise.all(
    deferredTools.map(async tool => {
      const description = await tool.prompt({
        getToolPermissionContext,
        tools,
        agents,
      })
      const inputSchema = tool.inputJSONSchema
        ? jsonStringify(tool.inputJSONSchema)
        : tool.inputSchema
          ? jsonStringify(zodToJsonSchema(tool.inputSchema))
          : ''
      return tool.name.length + description.length + inputSchema.length
    }),
  )

  return sizes.reduce((total, size) => total + size, 0)
}

/**
 * Check if tool search (MCP tool deferral with tool_reference) is enabled for a specific request.