Disassemble EVM bytecode into human-readable opcodes using Heimdall
AI agents call heimdall_disassemble to retrieve information from Foundry MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Disassembly is a non-destructive, read-only operation that analyzes compiled code artifacts. It has no side effects, cannot modify data, and does not execute arbitrary operations. The tool retrieves and transforms information about bytecode structure for inspection purposes, fitting the 'Read' category.
From the tool's definition The tool 'heimdall_disassemble' performs static analysis by disassembling EVM bytecode into human-readable opcodes.
Documented attack patterns abuse exactly the kind of access heimdall_disassemble gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Foundry MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for heimdall_disassemble:
{
"version": "1",
"default": "deny",
"tools": {
"heimdall_disassemble": {}
}
}heimdall_disassemble is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Disassemble EVM bytecode into human-readable opcodes using Heimdall. It is categorised as a Read tool in the Foundry MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Foundry MCP Server MCP server in PolicyLayer and add a rule for heimdall_disassemble: 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 Foundry MCP Server. Nothing to install.
heimdall_disassemble 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 heimdall_disassemble 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 heimdall_disassemble. 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.
heimdall_disassemble is provided by the Foundry MCP Server MCP server (praneshasp/foundry-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 16 Foundry MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
16 Foundry MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.