AI agents call list_tags to retrieve information from Kanban without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Listing tags is a non-destructive query that retrieves data with no side effects. It does not create, modify, delete, or execute external operations. This is a standard Read category operation with low blast radius if misused by an AI agent—the worst outcome would be exposure of tag metadata.
From the tool's definition Tool name 'list_tags' indicates a retrieval/query operation that returns existing tags. The absence of descriptive text is typical for simple list operations.
Documented attack patterns abuse exactly the kind of access list_tags gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Kanban, and nothing reaches the server without passing your rules. This is the rule we recommend for list_tags:
{
"version": "1",
"default": "deny",
"tools": {
"list_tags": {}
}
}list_tags is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
list_tags. It is categorised as a Read tool in the Kanban MCP Server, which means it retrieves data without modifying state.
Register the Kanban MCP server in PolicyLayer and add a rule for list_tags: 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 Kanban. Nothing to install.
list_tags 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_tags 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_tags. 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_tags is provided by the Kanban MCP server (multidimensionalcats/kanban-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Kanban, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
45 Kanban tools catalogued and risk-classified — across an index of 43,000+ MCP servers.