AI agents use set_script_text to create or update resources in PlayCanvas Editor MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your PlayCanvas Editor MCP Server environment.
This tool creates or modifies script code reversibly—the primary characteristic of Write category. While scripts are executable, the tool itself does not execute them; it only sets their content. However, the severity is high because malicious script content could compromise the application's behavior, security, or user experience.
From the tool's definition Tool name 'set_script_text' with description 'Set script content' indicates modification of script files. In the context of a PlayCanvas Editor MCP server that 'enables LLMs to build real-time 3D web applications', this tool modifies executable code that will…
Documented attack patterns abuse exactly the kind of access set_script_text gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and PlayCanvas Editor MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for set_script_text:
{
"version": "1",
"default": "deny",
"tools": {
"set_script_text": {
"limits": [
{
"counter": "set_script_text_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}set_script_text stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Set script content. It is categorised as a Write tool in the PlayCanvas Editor MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the PlayCanvas Editor MCP Server MCP server in PolicyLayer and add a rule for set_script_text: 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 PlayCanvas Editor MCP Server. Nothing to install.
set_script_text 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 set_script_text 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 set_script_text. 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.
set_script_text is provided by the PlayCanvas Editor MCP Server MCP server (playcanvas/editor-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 23 PlayCanvas Editor MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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23 PlayCanvas Editor MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.