Apply a targeted edit to a script — replace a specific section of code. The change is staged as a diff for review (unless auto-accept is on). Args: - path (string): Script path - oldText (string): The exact text to find and replace (must match uniquely) - newText (string): Replacement text Return...
AI agents use patch_script 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 creates or modifies code in Roblox scripts reversibly. While it could cause operational issues if malicious code is injected, it is not destructive (changes can be reviewed and reverted), not financial, and not execute-level (it modifies scripts rather than running arbitrary operations directly).
From the tool's definition Tool description states 'Apply a targeted edit to a script — replace a specific section of code' and takes oldText/newText arguments to modify script content.
Attacks that exploit this kind of access
Apply a targeted edit to a script — replace a specific section of code. The change is staged as a diff for review (unless auto-accept is on). Args: - path (string): Script path - oldText (string): The exact text to find and replace (must match uniquely) - newText (string): Replacement text Returns: Diff summary of the targeted 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 patch_script: 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.
patch_script 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 patch_script 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 patch_script. 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.
patch_script 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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