[AdCP Media Buy] Update an existing media buy (campaign). Modify budget, targeting, schedule, or status of an existing media buy. WHEN TO USE: - Adjusting campaign budget mid-flight - Pausing or resuming a campaign - Changing targeting parameters - Extending campaign dates EXAMPLE: update_media_b...
Risk signalsHigh parameter count (12 properties)
Part of the Trillboards DOOH Advertising server.
Free to start. No card required.
AI agents use update_media_buy to create or modify resources in Trillboards DOOH Advertising. 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_media_buy 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 Trillboards DOOH Advertising.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"update_media_buy": {
"limits": [
{
"counter": "update_media_buy_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Trillboards DOOH Advertising policy for all 74 tools.
These attack patterns abuse exactly the kind of access update_media_buy 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.
[AdCP Media Buy] Update an existing media buy (campaign). Modify budget, targeting, schedule, or status of an existing media buy. WHEN TO USE: - Adjusting campaign budget mid-flight - Pausing or resuming a campaign - Changing targeting parameters - Extending campaign dates EXAMPLE: update_media_buy({ media_buy_id: "mbuy_abc123", updates: { status: "paused", budget: { daily_usd: 300 } } }). It is categorised as a Write tool in the Trillboards DOOH Advertising MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Trillboards DOOH Advertising MCP server in PolicyLayer and add a rule for update_media_buy: 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 Trillboards DOOH Advertising. Nothing to install.
update_media_buy 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_media_buy 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_media_buy. 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_media_buy is provided by the Trillboards DOOH Advertising MCP server (https://api.trillboards.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 74 Trillboards DOOH Advertising tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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