AI agents call dedup_get to retrieve information from Burp Mcp Plus without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves data from a deduplication cache or list by index lookup. The verb 'Fetch' combined with no indication of mutation, deletion, or external execution means this is a Read operation. The severity is low because retrieving cached HTTP request data poses minimal risk—the data is already within Burp Suite's local context and cannot affect external systems or cause data loss.
From the tool's definition Tool name 'dedup_get' and description 'Fetch a dedup entry by its 1-based index' indicate retrieval of a stored deduplication entry without modification or side effects.
Documented attack patterns abuse exactly the kind of access dedup_get gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Burp Mcp Plus, and nothing reaches the server without passing your rules. This is the rule we recommend for dedup_get:
{
"version": "1",
"default": "deny",
"tools": {
"dedup_get": {}
}
}dedup_get is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Fetch a dedup entry by its 1-based index. It is categorised as a Read tool in the Burp Mcp Plus MCP Server, which means it retrieves data without modifying state.
Register the Burp Mcp Plus MCP server in PolicyLayer and add a rule for dedup_get: 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 Burp Mcp Plus. Nothing to install.
dedup_get 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 dedup_get 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 dedup_get. 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.
dedup_get is provided by the Burp Mcp Plus MCP server (titaniumtushar/burp-mcp-plus). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Burp Mcp Plus, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
20 Burp Mcp Plus tools catalogued and risk-classified — across an index of 43,000+ MCP servers.