Simple health check tool to verify MCP server is running
AI agents call mcp_health to retrieve information from MCP Android Agent without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only checks whether the MCP server is operational. It retrieves status information with no side effects, data modification, or destructive actions possible.
From the tool's definition Simple health check tool to verify MCP server is running
Documented attack patterns abuse exactly the kind of access mcp_health gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Android Agent, and nothing reaches the server without passing your rules. This is the rule we recommend for mcp_health:
{
"version": "1",
"default": "deny",
"tools": {
"mcp_health": {}
}
}mcp_health is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Simple health check tool to verify MCP server is running. It is categorised as a Read tool in the MCP Android Agent MCP Server, which means it retrieves data without modifying state.
Register the MCP Android Agent MCP server in PolicyLayer and add a rule for mcp_health: 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 MCP Android Agent. Nothing to install.
mcp_health 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 mcp_health 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 mcp_health. 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.
mcp_health is provided by the MCP Android Agent MCP server (nim444/mcp-android-server-python). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 28 MCP Android Agent tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
28 MCP Android Agent tools catalogued and risk-classified — across an index of 42,500+ MCP servers.