AI agents call get_functions to retrieve information from Binaryninja without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves metadata (function list) from a binary analysis session. It performs no side effects, does not execute code, does not modify data, and does not affect the system. This is a straightforward read/query operation consistent with other Read-category tools on the same server (get_data_variables, get_exports, get_imports, get_sections, get_segments, get_strings, etc.).
From the tool's definition Tool name is 'get_functions' and description states 'Get list of functions'. This is a retrieval operation that queries binary analysis data without modifying or executing anything.
Documented attack patterns abuse exactly the kind of access get_functions gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Binaryninja, and nothing reaches the server without passing your rules. This is the rule we recommend for get_functions:
{
"version": "1",
"default": "deny",
"tools": {
"get_functions": {}
}
}get_functions is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get list of functions. It is categorised as a Read tool in the Binaryninja MCP Server, which means it retrieves data without modifying state.
Register the Binaryninja MCP server in PolicyLayer and add a rule for get_functions: 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 Binaryninja. Nothing to install.
get_functions 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_functions 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_functions. 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_functions is provided by the Binaryninja MCP server (mcpphalanx/binaryninja-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Binaryninja, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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16 Binaryninja tools catalogued and risk-classified — across an index of 43,000+ MCP servers.