AI agents call dedup_search 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.
The tool performs a read-only regex search against a deduplication data source. No data is created, modified, deleted, or executed. The operation is a passive query with no side effects.
From the tool's definition Tool name is 'dedup_search' and description states 'Regex-search a registered dedup source' — this is a search/query operation that retrieves data without modifying state.
Documented attack patterns abuse exactly the kind of access dedup_search 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_search:
{
"version": "1",
"default": "deny",
"tools": {
"dedup_search": {}
}
}dedup_search is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Regex-search a registered dedup source. 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_search: 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_search 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_search 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_search. 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_search 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.
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20 Burp Mcp Plus tools catalogued and risk-classified — across an index of 43,000+ MCP servers.