Apply the same field updates to every record on a table matching an encoded query, up to a row limit (default 100). Issues one PATCH per matched record. Use carefully — this fires business rules and workflows for each row.
AI agents use snow_bulk_update to create or update resources in Serac — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Serac environment.
This tool creates or modifies data reversibly via PATCH operations on multiple records. While it updates many rows at once (bulk), the changes are not permanent deletions and can be undone by applying inverse updates. It is Write (not Destructive) because records remain intact and modifiable.
From the tool's definition "Apply the same field updates to every record on a table matching an encoded query" and "Issues one PATCH per matched record" indicate bulk modification of records.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
Apply the same field updates to every record on a table matching an encoded query, up to a row limit (default 100). Issues one PATCH per matched record. Use carefully — this fires business rules and workflows for each row. It is categorised as a Write tool in the Serac MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Serac MCP server in PolicyLayer and add a rule for snow_bulk_update: 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 Serac. Nothing to install.
snow_bulk_update 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 snow_bulk_update 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 snow_bulk_update. 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.
snow_bulk_update is provided by the Serac MCP server (serac-labs/serac). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
snow_bulk_update is one line of Serac's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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