Function validateInput

src/tools/GrepTool/GrepTool.ts:201–232

({ path })

    return rulePattern => matchWildcardPattern(rulePattern, pattern)
  },
  async validateInput({ path }): Promise<ValidationResult> {
    // If path is provided, validate that it exists
    if (path) {
      const fs = getFsImplementation()
      const absolutePath = expandPath(path)

      // SECURITY: Skip filesystem operations for UNC paths to prevent NTLM credential leaks.
      if (absolutePath.startsWith('\\\\') || absolutePath.startsWith('//')) {
        return { result: true }
      }

      try {
        await fs.stat(absolutePath)
      } catch (e: unknown) {
        if (isENOENT(e)) {
          const cwdSuggestion = await suggestPathUnderCwd(absolutePath)
          let message = `Path does not exist: ${path}. ${FILE_NOT_FOUND_CWD_NOTE} ${getCwd()}.`
          if (cwdSuggestion) {
            message += ` Did you mean ${cwdSuggestion}?`
          }
          return {
            result: false,
            message,
            errorCode: 1,
          }
        }
        throw e
      }
    }

    return { result: true }
  },
  async checkPermissions(input, context): Promise<PermissionDecision> {
    const appState = context.getAppState()
    return checkReadPermissionForTool(