AI agents use update_source to create or update resources in Automagik Tools — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Automagik Tools environment.
This tool modifies workflow source configurations, which is a Write operation (creates or modifies data reversibly). The severity is medium because misconfigured sources could impact workflow behavior and potentially expose or redirect data flows, but the operation itself is reversible.
From the tool's definition Tool name 'update_source' and description 'Update a workflow source configuration' indicate modification of existing configuration data. The verb 'update' is explicitly mentioned, which is a reversible write operation.
Documented attack patterns abuse exactly the kind of access update_source gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Automagik Tools, and nothing reaches the server without passing your rules. This is the rule we recommend for update_source:
{
"version": "1",
"default": "deny",
"tools": {
"update_source": {
"limits": [
{
"counter": "update_source_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}update_source 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.
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Update a workflow source configuration. It is categorised as a Write tool in the Automagik Tools MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Automagik Tools MCP server in PolicyLayer and add a rule for update_source: 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 Automagik Tools. Nothing to install.
update_source 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_source 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_source. 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_source is provided by the Automagik Tools MCP server (namastexlabs/automagik-tools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Automagik Tools, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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122 Automagik Tools tools catalogued and risk-classified — across an index of 43,000+ MCP servers.