update_reddit_ads_ad_group
Change an existing Reddit ad group’s name, budget, goal type, bid, schedule dates or targeting. Budget and bid are ordinary amounts in the ad account’s currency. Targeting MERGES KEY BY KEY — measured live 2026-08-05, and it is NOT a wholesale replace: a key you send replaces that whole list, a k...
This record as markdown: /tools/hermoso/update-reddit-ads-ad-group.md
What update_reddit_ads_ad_group does on Hermoso
AI agents use update_reddit_ads_ad_group to create or update resources in Hermoso, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Hermoso environment.
Why update_reddit_ads_ad_group is rated Medium
An AI agent can call update_reddit_ads_ad_group faster than any human can review: one bad instruction and it creates or modifies resources in Hermoso by the hundred, each call as confident as the last.
Attacks that exploit this kind of access
The rule that runs update_reddit_ads_ad_group safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Hermoso, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For update_reddit_ads_ad_group, this is the rule to start with:
update_reddit_ads_ad_group 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Hermoso, apply this rule, and every update_reddit_ads_ad_group call is checked against it from then on.
Questions about update_reddit_ads_ad_group
Change an existing Reddit ad group’s name, budget, goal type, bid, schedule dates or targeting. Budget and bid are ordinary amounts in the ad account’s currency. Targeting MERGES KEY BY KEY — measured live 2026-08-05, and it is NOT a wholesale replace: a key you send replaces that whole list, a key you LEAVE OUT is kept exactly as it was, and an explicit empty array (geolocations: []) is the only way to clear one. So passing just {communities:[…]} does NOT drop an existing geo or interest filter on an ad group that holds the budget — name every key you want gone. This does NOT activate or pause anything; use set_reddit_ads_status for that. The result is read back from Reddit. It is categorised as a Write tool in the Hermoso MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Hermoso MCP server in PolicyLayer and add a rule for update_reddit_ads_ad_group: 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 Hermoso. Nothing to install.
update_reddit_ads_ad_group 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_reddit_ads_ad_group 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_reddit_ads_ad_group. 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_reddit_ads_ad_group is provided by the Hermoso MCP server (https://app.hermoso.ai/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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