AI agents use patch_bytes 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.
The name 'patch_bytes' strongly implies modifying raw bytes in a binary, which is a write operation that alters binary data. In a reverse engineering context, patching bytes modifies the binary content. While this could be destructive if it overwrites data irreversibly, patching in Binary Ninja typically operates on an in-memory representation or a copy, making Write the most appropriate category.
From the tool's definition Tool name 'patch_bytes' — description is empty/uninformative
Documented attack patterns abuse exactly the kind of access patch_bytes 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 patch_bytes:
{
"version": "1",
"default": "deny",
"tools": {
"patch_bytes": {
"limits": [
{
"counter": "patch_bytes_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}patch_bytes 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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patch_bytes. 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 patch_bytes: 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.
patch_bytes 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 patch_bytes 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 patch_bytes. 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.
patch_bytes 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.