Get available serving units for custom foods Returns the list of valid serving units (e.g. G, ML, OZ) that can be used when creating custom foods.
AI agents call get_custom_food_serving_units to retrieve information from Garmin MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns reference data (available serving units) for use in other operations. It does not modify, create, delete, or execute anything; it is a simple read/lookup operation. The data returned is non-sensitive metadata. Confidence is high because the intent is unambiguous.
From the tool's definition Tool name contains 'get' and description states it 'Returns the list of valid serving units' — a retrieval operation with no side effects.
Documented attack patterns abuse exactly the kind of access get_custom_food_serving_units gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Garmin MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_custom_food_serving_units:
{
"version": "1",
"default": "deny",
"tools": {
"get_custom_food_serving_units": {}
}
}get_custom_food_serving_units is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get available serving units for custom foods Returns the list of valid serving units (e.g. G, ML, OZ) that can be used when creating custom foods. It is categorised as a Read tool in the Garmin MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Garmin MCP Server MCP server in PolicyLayer and add a rule for get_custom_food_serving_units: 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 Garmin MCP Server. Nothing to install.
get_custom_food_serving_units 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 get_custom_food_serving_units 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 get_custom_food_serving_units. 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.
get_custom_food_serving_units is provided by the Garmin MCP Server MCP server (taxuspt/garmin_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 126 Garmin MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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126 Garmin MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.