claude-code - 💡(How to fix) Fix Edit tool: InputValidationError about required parameters missing, intermittent, retries succeed [1 comments, 2 participants]

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anthropics/claude-code#54837Fetched 2026-04-30 06:34:32
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Error Message

InputValidationError: Edit failed due to the following issues: The required parameter file_path is missing The required parameter old_string is missing The required parameter new_string is missing

Code Example

InputValidationError: Edit failed due to the following issues:
  The required parameter `file_path` is missing
  The required parameter `old_string` is missing
  The required parameter `new_string` is missing
RAW_BUFFERClick to expand / collapse

Problem

Edit tool calls intermittently fail with:

InputValidationError: Edit failed due to the following issues:
  The required parameter `file_path` is missing
  The required parameter `old_string` is missing
  The required parameter `new_string` is missing

The parameters ARE being provided (I can see them in the JSONL session log). Retrying the same call with identical parameters succeeds.

Background

This is closely related to the Write variant in #895 (still open) and #36518 (closed as duplicate of #30893, which is actually about the Skill tool and a different bug). There's no dedicated tracking issue for the Edit variant, even though the Edit variant is the one I hit most often in practice.

Impact

  • Clutters JSONL history with phantom failures that downstream tooling (task-forge error-collector, audit scripts) misclassifies as real plugin bugs
  • Wastes tokens on retry narration
  • Intermittent by nature so hard to build a repro for

Environment

  • Claude Code CLI 2.1.80+
  • Windows 11
  • claude-opus-4-7 (1M context) via Bedrock

Suggested Fix

  1. Log the full tool-use input blob server-side when validation fails so the user/agent can tell whether the params were genuinely missing or were stripped in transit.
  2. If it's a transport-layer param-drop issue (as #36518 reporter observed across Read/Edit/Bash), it should be fixed in the transport, not worked around by retry narration.

extent analysis

TL;DR

Implement server-side logging of the full tool-use input blob when validation fails to diagnose whether parameters are being stripped in transit.

Guidance

  • Verify that the parameters are being sent correctly by checking the JSONL session log for the failed requests.
  • Investigate the transport layer to determine if it's causing the parameter drop issue, as suggested by the similarity to #36518.
  • Consider implementing a more robust retry mechanism that doesn't rely on narration to mitigate the impact of intermittent failures.
  • Review the code for any potential issues with parameter handling or validation that could be contributing to the problem.

Example

No code snippet is provided as it's not clearly supported by the issue.

Notes

The issue is intermittent and difficult to reproduce, making it challenging to provide a definitive fix. The suggested fix is focused on diagnosing the issue rather than providing a direct solution.

Recommendation

Apply workaround: Implement server-side logging to diagnose the issue, as it will provide more insight into what's causing the parameter drop and help determine the best course of action.

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claude-code - 💡(How to fix) Fix Edit tool: InputValidationError about required parameters missing, intermittent, retries succeed [1 comments, 2 participants]