Adjust the available inventory for a specific inventory_item at a specific location by a delta (positive to increase, negative to decrease).
AI agents use adjust_inventory to create or update resources in Mcp Ap2 — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Ap2 environment.
This tool modifies inventory levels, which is a write operation. It can increase or decrease stock quantities, which could be misused to artificially inflate or deflate inventory records. While reversible in principle (you can re-adjust), incorrect inventory adjustments can cause significant operational and financial downstream impact, warranting a high severity rating.
From the tool's definition Adjust the available inventory for a specific inventory_item at a specific location by a delta (positive to increase, negative to decrease)
Documented attack patterns abuse exactly the kind of access adjust_inventory gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Ap2, and nothing reaches the server without passing your rules. This is the rule we recommend for adjust_inventory:
{
"version": "1",
"default": "deny",
"tools": {
"adjust_inventory": {
"limits": [
{
"counter": "adjust_inventory_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}adjust_inventory stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Adjust the available inventory for a specific inventory_item at a specific location by a delta (positive to increase, negative to decrease). It is categorised as a Write tool in the Mcp Ap2 MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mcp Ap2 MCP server in PolicyLayer and add a rule for adjust_inventory: 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 Ap2. Nothing to install.
adjust_inventory 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 adjust_inventory 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 adjust_inventory. 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.
adjust_inventory is provided by the Mcp Ap2 MCP server (@codespar/mcp-ap2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Mcp Ap2, 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.
1300 Mcp Ap2 tools catalogued and risk-classified — across an index of 43,000+ MCP servers.