Search with faceted filtering. Filter results by hardware components (SID, VIC-II, CIA, etc.), assembly instructions (LDA, STA, etc.), or memory registers ($D000, etc.). Great for narrowing down search results to specific technical domains.
AI agents call faceted_search to retrieve information from TDZ C64 Knowledge without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves and filters documentation search results by technical categories (hardware components, assembly instructions, memory registers). This is fundamentally a read-only search operation with no side effects, data modification, code execution, or destructive capability.
From the tool's definition Tool performs 'Search with faceted filtering' and 'Filter results' — pure query operations with no modification or execution of data.
Attacks that exploit this kind of access
Search with faceted filtering. Filter results by hardware components (SID, VIC-II, CIA, etc.), assembly instructions (LDA, STA, etc.), or memory registers ($D000, etc.). Great for narrowing down search results to specific technical domains. 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 faceted_search: 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.
faceted_search 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 faceted_search 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 faceted_search. 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.
faceted_search 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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