List all stored context variables.
AI agents call memcp_list_contexts to retrieve information from Memcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple enumeration of existing stored contexts. It has no capacity to modify, delete, or execute operations—it only retrieves metadata about what contexts exist in the persistent memory store. The blast radius of misuse is minimal; an agent listing contexts cannot cause damage beyond information disclosure about what has been stored. Classification as Read is appropriate.
From the tool's definition Tool name 'memcp_list_contexts' and description 'List all stored context variables' indicate a query/retrieval operation with no side effects. The verb 'list' is a classic read operation that retrieves and displays data without modification.
Documented attack patterns abuse exactly the kind of access memcp_list_contexts gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Memcp, and nothing reaches the server without passing your rules. This is the rule we recommend for memcp_list_contexts:
{
"version": "1",
"default": "deny",
"tools": {
"memcp_list_contexts": {}
}
}memcp_list_contexts is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all stored context variables. It is categorised as a Read tool in the Memcp MCP Server, which means it retrieves data without modifying state.
Register the Me MCP server in PolicyLayer and add a rule for memcp_list_contexts: 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 Memcp. Nothing to install.
memcp_list_contexts 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 memcp_list_contexts 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 memcp_list_contexts. 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.
memcp_list_contexts is provided by the Me MCP server (maydali28/memcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Memcp, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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24 Memcp tools catalogued and risk-classified — across an index of 43,000+ MCP servers.