Method validateString

src/mcp/tools.ts:1684–1698

* Validate that a value is a non-empty string within length bounds. * * The `maxLength` cap protects against MCP clients that ship huge * payloads (10MB+ query strings either by accident or maliciously). * Without this, a single oversized input can pin the FTS5 index or * exhaust memo

(
    value: unknown,
    name: string,
    maxLength: number = MAX_INPUT_LENGTH
  )

   * exhaust memory before any real work runs.
   */
  private validateString(
    value: unknown,
    name: string,
    maxLength: number = MAX_INPUT_LENGTH
  ): string | ToolResult {
    if (typeof value !== 'string' || value.length === 0) {
      return this.errorResult(`${name} must be a non-empty string`);
    }
    if (value.length > maxLength) {
      return this.errorResult(
        `${name} exceeds maximum length of ${maxLength} characters (got ${value.length})`
      );
    }
    return value;
  }

  /**
   * Validate an optional path-like string input. Returns the value if