AI agents call get_source to retrieve information from Dex without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read operation that queries and retrieves script source code from a Roblox instance. It does not modify state, execute code, or cause destructive changes. The 'if readable' qualifier and reference-based access indicate standard read permissions apply.
From the tool's definition Read the Source of a Script/LocalScript/ModuleScript by ref, if readable. The tool retrieves source code content with no modification or side effects.
Attacks that exploit this kind of access
Read the Source of a Script/LocalScript/ModuleScript by ref, if readable. It is categorised as a Read tool in the Dex MCP Server, which means it retrieves data without modifying state.
Register the Dex MCP server in PolicyLayer and add a rule for get_source: 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 Dex. Nothing to install.
get_source is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_source 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 get_source. 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.
get_source is provided by the Dex MCP server (sanztheo/dex-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
get_source is one line of Dex's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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