AI agents call list_users to retrieve information from Canva API 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 user data without modifying, deleting, or executing operations. It has a low blast radius—listing users is a read-only action that presents minimal risk even if misused by an AI agent. No side effects or irreversible actions are implied.
From the tool's definition Tool name 'list_users' indicates a retrieval operation that queries and returns a list of users. The description is empty, but the naming convention is consistent with sibling read-only tools on the server (get_asset, get_brand, get_design, list_assets,…
Documented attack patterns abuse exactly the kind of access list_users gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Canva API MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_users:
{
"version": "1",
"default": "deny",
"tools": {
"list_users": {}
}
}list_users 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_users. It is categorised as a Read tool in the Canva API MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Canva API MCP Server MCP server in PolicyLayer and add a rule for list_users: 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 Canva API MCP Server. Nothing to install.
list_users 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_users 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_users. 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_users is provided by the Canva API MCP Server MCP server (mattcoatsworth/canva-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Canva API MCP Server, 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.
9 Canva API MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.