Method validateToolParams

packages/core/src/tools/write-file.ts:417–460

(
    params: WriteFileToolParams,
  )

  }

  protected override validateToolParams(
    params: WriteFileToolParams,
  ): string | null {
    const errors = SchemaValidator.validate(
      this.schema.parametersJsonSchema,
      params,
    );
    if (errors) {
      return errors;
    }

    const filePath = params.file_path;

    if (!filePath) {
      return `Missing or empty "file_path"`;
    }

    if (!path.isAbsolute(filePath)) {
      return `File path must be absolute: ${filePath}`;
    }

    const workspaceContext = this.config.getWorkspaceContext();
    if (!workspaceContext.isPathWithinWorkspace(filePath)) {
      const directories = workspaceContext.getDirectories();
      return `File path must be within one of the workspace directories: ${directories.join(
        ', ',
      )}`;
    }

    try {
      if (fs.existsSync(filePath)) {
        const stats = fs.lstatSync(filePath);
        if (stats.isDirectory()) {
          return `Path is a directory, not a file: ${filePath}`;
        }
      }
    } catch (statError: unknown) {
      return `Error accessing path properties for validation: ${filePath}. Reason: ${
        statError instanceof Error ? statError.message : String(statError)
      }`;
    }

    return null;
  }

  protected createInvocation(
    params: WriteFileToolParams,