subscribe_to_object_notifications
Subscribe the authenticated account to notifications for a raw Huly object by adding a core collaborator row. Idempotent when already subscribed.
This record as markdown: /tools/io-github-dearlordylord-huly-mcp/subscribe-to-object-notifications.md
What subscribe_to_object_notifications does on Huly
AI agents use subscribe_to_object_notifications to create or update resources in Huly, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Huly environment.
Why subscribe_to_object_notifications is rated Medium
This tool creates a new subscription/collaborator relationship for the authenticated user. It modifies data by adding a collaborator row, but is reversible (can be unsubscribed) and has low blast radius — it only affects notification delivery for the authenticated account.
From the tool's definition Subscribe the authenticated account to notifications for a raw Huly object by adding a core collaborator row. Idempotent when already subscribed.
Attacks that exploit this kind of access
The rule that runs subscribe_to_object_notifications safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Huly, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For subscribe_to_object_notifications, this is the rule to start with:
subscribe_to_object_notifications 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 Huly, apply this rule, and every subscribe_to_object_notifications call is checked against it from then on.
Questions about subscribe_to_object_notifications
Subscribe the authenticated account to notifications for a raw Huly object by adding a core collaborator row. Idempotent when already subscribed. It is categorised as a Write tool in the Huly MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Huly MCP server in PolicyLayer and add a rule for subscribe_to_object_notifications: 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 Huly. Nothing to install.
subscribe_to_object_notifications 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 subscribe_to_object_notifications 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 subscribe_to_object_notifications. 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.
subscribe_to_object_notifications is provided by the Huly MCP server (@firfi/huly-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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