AI agents use rename_variable to create or update resources in Kawaiidra MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Kawaiidra MCP environment.
Renaming a local variable is a reversible write operation that modifies analysis metadata (symbol tables, debug information) but does not alter the underlying binary or its execution behavior. It creates or modifies data within the Ghidra project database. While the context is binary analysis (potentially sensitive), the tool itself only performs a naming update, which is Write-category.
From the tool's definition Tool name is 'rename_variable' and description states it 'Rename[s] a local variable within a function.' This is a metadata modification operation within Ghidra's analysis project.
Documented attack patterns abuse exactly the kind of access rename_variable gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Kawaiidra MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for rename_variable:
{
"version": "1",
"default": "deny",
"tools": {
"rename_variable": {
"limits": [
{
"counter": "rename_variable_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}rename_variable 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 a local variable within a function. It is categorised as a Write tool in the Kawaiidra MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Kawaiidra MCP server in PolicyLayer and add a rule for rename_variable: 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 Kawaiidra MCP. Nothing to install.
rename_variable 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_variable 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_variable. 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_variable is provided by the Kawaiidra MCP server (wagonbomb/kawaiidra-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Kawaiidra MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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94 Kawaiidra MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.