List custom rules registered in this server session via add_custom_rule. Does NOT include customPatterns declared in .techdebtrc.json (those run inside analyze_project via AnalysisEngine but are not surfaced here). Renamed from list_custom_rules (TEC-51) for clarity; the old name is no longer reg...
AI agents call list_session_custom_rules to retrieve information from Tech Debt MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and enumerates existing custom rules from the current session without creating, modifying, deleting, or executing anything. It is purely informational/querying in nature. The low severity reflects minimal blast radius if misused by an agent—at worst, it reveals metadata about configured rules.
From the tool's definition Tool name is 'list_session_custom_rules' with description stating it 'List[s] custom rules registered in this server session'.
Documented attack patterns abuse exactly the kind of access list_session_custom_rules gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Tech Debt MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_session_custom_rules:
{
"version": "1",
"default": "deny",
"tools": {
"list_session_custom_rules": {}
}
}list_session_custom_rules is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List custom rules registered in this server session via add_custom_rule. Does NOT include customPatterns declared in .techdebtrc.json (those run inside analyze_project via AnalysisEngine but are not surfaced here). Renamed from list_custom_rules (TEC-51) for clarity; the old name is no longer registered. It is categorised as a Read tool in the Tech Debt MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Tech Debt MCP Server MCP server in PolicyLayer and add a rule for list_session_custom_rules: 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 Tech Debt MCP Server. Nothing to install.
list_session_custom_rules 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 list_session_custom_rules 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 list_session_custom_rules. 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.
list_session_custom_rules is provided by the Tech Debt MCP Server MCP server (pierrejanineh/techdebtmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Tech Debt MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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16 Tech Debt MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.