Update the bid_modifier of a single campaign_criterion.
AI agents use google_ads_bid_adjustments_update to create or update resources in Mureo — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mureo environment.
This tool modifies campaign bid adjustments, which changes how much an advertiser pays for ads and which audiences/contexts they target. While reversible (bids can be adjusted again), the modification is direct and consequential to ad spend and performance.
From the tool's definition Tool description states 'Update the bid_modifier of a single campaign_criterion', which is a direct modification of campaign settings that affects ad delivery and cost-per-click.
Documented attack patterns abuse exactly the kind of access google_ads_bid_adjustments_update gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mureo, and nothing reaches the server without passing your rules. This is the rule we recommend for google_ads_bid_adjustments_update:
{
"version": "1",
"default": "deny",
"tools": {
"google_ads_bid_adjustments_update": {
"limits": [
{
"counter": "google_ads_bid_adjustments_update_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}google_ads_bid_adjustments_update 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.
Update the bid_modifier of a single campaign_criterion. It is categorised as a Write tool in the Mureo MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mureo MCP server in PolicyLayer and add a rule for google_ads_bid_adjustments_update: 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 Mureo. Nothing to install.
google_ads_bid_adjustments_update 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 google_ads_bid_adjustments_update 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 google_ads_bid_adjustments_update. 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.
google_ads_bid_adjustments_update is provided by the Mureo MCP server (logly/mureo). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Mureo, 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.
185 Mureo tools catalogued and risk-classified — across an index of 43,000+ MCP servers.