Insert new lines into a script after a given line. The change is staged as a diff for review (unless auto-accept is on). Args: - path (string): Script path - afterLine (number): Insert after this line (0 = insert at top) - content (string): Content to insert Returns: Diff summary of the change.
AI agents use insert_script_lines to create or update resources in Melo — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Melo environment.
This tool modifies script content by inserting new lines, which is a reversible write operation. The diff/review mechanism further confirms it's a staged write rather than immediate destructive action. Misuse could introduce malicious code into Roblox scripts, hence medium severity.
From the tool's definition Insert new lines into a script after a given line. The change is staged as a diff for review (unless auto-accept is on).
Attacks that exploit this kind of access
Insert new lines into a script after a given line. The change is staged as a diff for review (unless auto-accept is on). Args: - path (string): Script path - afterLine (number): Insert after this line (0 = insert at top) - content (string): Content to insert Returns: Diff summary of the change. It is categorised as a Write tool in the Melo MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Melo MCP server in PolicyLayer and add a rule for insert_script_lines: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Melo. Nothing to install.
insert_script_lines is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the insert_script_lines rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for insert_script_lines. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
insert_script_lines is provided by the Melo MCP server (yannyhl/linkedsword-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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