deepseek-ai/deepseek-harness · error · ToolNotFoundError

UNKNOWN_TOOL

UNKNOWN_TOOL

Error message

unknown tool "${toolName}"

What it means

Error "unknown tool "${toolName}"" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/core/tools/src/index.ts:1547

   * into any around-wrapper replacement. Cancellation never abandons the body:
   * a started promise reaches quiescence before its outcome becomes `ABORTED`.
   */
  private async dispatchToolBody(exec: MutableToolRunContext): Promise<ToolExecutionResult> {
    const state = this.cancellationStates.get(exec)
    /* v8 ignore next -- only registry-minted executions reach the staged scheduler methods */
    if (state === undefined) throw new Error('tool registry scheduler invariant violated: missing cancellation state')
    const wrapperSignal = exec.signal
    const fused = fuseToolSignals(state.callerSignal, wrapperSignal)
    const signal = fused.signal

    if (isAborted(signal)) {
      fused.dispose()
      return toolAbortedBeforeDispatchResult()
    }
    exec.signal = signal
    try {
      const tool = this.resolveExecution(exec.name, exec.agent, exec.parent !== undefined)
      if (!tool) throw new ToolNotFoundError(exec.name)
      state.bodyInvoked = true
      const returned = await tool.execute(exec.arguments, exec)
      const result = this.createSuccessResult(exec, tool, returned)
      return isAborted(signal)
        ? toolAbortedResult(result)
        : result
    } catch (error: unknown) {
      return toolErrorResult(error)
    } finally {
      fused.dispose()
      exec.signal = wrapperSignal
    }
  }

  /**
   * Run around-dispatch and the tool body. Tool and unknown-tool failures still
   * receive post-execute; pipeline failures are already final.
   * @param exec - the prepared execution.

View on GitHub (pinned to b150a551b8)

When it happens

Trigger: Thrown at packages/core/tools/src/index.ts:1547 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of deepseek-ai/deepseek-harness@b150a551b8 (2026-08-24). Data as JSON: /api/errors/6780bdbc6b87a041. Report an issue: GitHub.