[AdCP Signals] Activate an audience signal for DSP targeting. Generates IAB Audience Taxonomy 1.1 segment parameters that DSPs can use in bid requests. Returns an activation_key token for referencing this signal activation. WHEN TO USE: - Converting audience signals into actionable targeting para...
Risk signalsHigh parameter count (10 properties)
Part of the Trillboards DOOH Advertising server.
Free to start. No card required.
AI agents use activate_signal 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 activate_signal 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": {
"activate_signal": {
"limits": [
{
"counter": "activate_signal_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 activate_signal 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 Signals] Activate an audience signal for DSP targeting. Generates IAB Audience Taxonomy 1.1 segment parameters that DSPs can use in bid requests. Returns an activation_key token for referencing this signal activation. WHEN TO USE: - Converting audience signals into actionable targeting parameters - Generating IAB segment IDs for programmatic bid requests - Creating reusable targeting configurations RETURNS: - activation_key: Token for referencing this activation (24h expiry) - targeting: { iab_segments, iab_taxonomy_version, custom_params } - screen_count, provider, data_source, methodology EXAMPLE: User: "Activate high-income professional targeting on my retail screens" activate_signal({ signal_type: "audience", parameters: { income: "high", lifestyle: "professional" }, screen_ids: ["507f1f77bcf86cd799439011"] }). 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 activate_signal: 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.
activate_signal 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 activate_signal 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 activate_signal. 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.
activate_signal 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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