Register a persistent threshold on a lens metric. Evaluated hourly; a fresh crossing writes a notification that surfaces in get_notifications. Scope (v1): friction.failure_rate, friction.proportion_of_wait, trend.failure_rate_delta on a specific target_system_id. Calling set_watch again with the ...
Single-target operation
Part of the ACR — Agent Composition Records MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents use set_watch to create or modify resources in ACR — Agent Composition Records. 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 set_watch repeatedly, creating or modifying resources faster than any human could review. Intercept's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach ACR — Agent Composition Records.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
tools:
set_watch:
rules:
- action: allow
rate_limit:
max: 30
window: 60See the full ACR — Agent Composition Records policy for all 30 tools.
Agents calling write-class tools like set_watch have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Write risk category across the catalogue. The same policy patterns (rate-limit, validate) apply to each.
Register a persistent threshold on a lens metric. Evaluated hourly; a fresh crossing writes a notification that surfaces in get_notifications. Scope (v1): friction.failure_rate, friction.proportion_of_wait, trend.failure_rate_delta on a specific target_system_id. Calling set_watch again with the same (lens, target, metric, condition) updates the threshold in place.. It is categorised as a Write tool in the ACR — Agent Composition Records MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Add a rule in your Intercept YAML policy under the tools section for set_watch. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the ACR — Agent Composition Records MCP server.
set_watch 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 set_watch rule in your Intercept 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 Intercept policy for set_watch. 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.
set_watch is provided by the ACR — Agent Composition Records MCP server (@tethral/acr-mcp). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic policy on every MCP tool call. Per-identity grants. Full audit log.