Find documents by cross-reference. Search for documents containing specific memory addresses ($D020), register offsets (VIC+0, SID+4), or page references (page 156). Great for tracking how specific registers or memory locations are documented.
AI agents call find_by_reference to retrieve information from TDZ C64 Knowledge without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and searches existing documentation based on memory addresses and register offsets. It has no side effects, does not modify data, execute code, delete content, or involve financial transactions. It is a pure Read operation consistent with search and lookup functionality on a knowledge base.
From the tool's definition Tool description states 'Find documents by cross-reference' and 'Search for documents' - these are query/search operations.
Attacks that exploit this kind of access
Find documents by cross-reference. Search for documents containing specific memory addresses ($D020), register offsets (VIC+0, SID+4), or page references (page 156). Great for tracking how specific registers or memory locations are documented. It is categorised as a Read tool in the TDZ C64 Knowledge MCP Server, which means it retrieves data without modifying state.
Register the TDZ C64 Knowledge MCP server in PolicyLayer and add a rule for find_by_reference: 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 TDZ C64 Knowledge. Nothing to install.
find_by_reference 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 find_by_reference 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 find_by_reference. 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.
find_by_reference is provided by the TDZ C64 Knowledge MCP server (michaeltroelsen/tdz-c64-knowledge). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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