AI agents use rename_symbol to create or update resources in BinAssistMCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your BinAssistMCP environment.
Renaming symbols in a binary analysis context modifies metadata reversibly—the change can be undone or re-renamed. This is a Write operation (modification) rather than Destructive (irreversible deletion). Severity is medium because misuse could corrupt the developer's reverse engineering workspace and make the binary harder to analyze, but the original binary itself remains intact and the change is easily reverted.
From the tool's definition Tool name 'rename_symbol' indicates modification of binary metadata. The server context (Binary Ninja reverse engineering tool) and sibling tools like 'batch_rename' confirm this performs write operations on symbol data within a binary analysis project.
Documented attack patterns abuse exactly the kind of access rename_symbol gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and BinAssistMCP, and nothing reaches the server without passing your rules. This is the rule we recommend for rename_symbol:
{
"version": "1",
"default": "deny",
"tools": {
"rename_symbol": {
"limits": [
{
"counter": "rename_symbol_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}rename_symbol 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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rename_symbol. It is categorised as a Write tool in the BinAssistMCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the BinAssist MCP server in PolicyLayer and add a rule for rename_symbol: 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 BinAssistMCP. Nothing to install.
rename_symbol 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 rename_symbol 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 rename_symbol. 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.
rename_symbol is provided by the BinAssist MCP server (symgraph/binassistmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 44 BinAssistMCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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44 BinAssistMCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.