Update grocery list items in bulk -- check off items, exclude items, or adjust quantities. Provide an array of updates, each specifying the item index and the fields to change.
Risk signalsBulk/mass operation — affects multiple targets
Part of the Mealmastery server.
Free to start. No card required.
AI agents use update_grocery_items to create or modify resources in Mealmastery. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call update_grocery_items repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Mealmastery.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"update_grocery_items": {
"limits": [
{
"counter": "update_grocery_items_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Mealmastery policy for all 24 tools.
These attack patterns abuse exactly the kind of access update_grocery_items gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Update grocery list items in bulk -- check off items, exclude items, or adjust quantities. Provide an array of updates, each specifying the item index and the fields to change.. It is categorised as a Write tool in the Mealmastery MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mealmastery MCP server in PolicyLayer and add a rule for update_grocery_items: 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 Mealmastery. Nothing to install.
update_grocery_items is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the update_grocery_items 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 update_grocery_items. 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.
update_grocery_items is provided by the Mealmastery MCP server (MealMasteryAI/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 24 Mealmastery tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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