snow_encode_base64
Encode a UTF-8 string as Base64. Local operation — no ServiceNow call. Handy for embedding binary-ish data in JSON payloads (e.g. attachment uploads).
This record as markdown: /tools/serac/snow-encode-base64.md
What snow_encode_base64 does on Serac
AI agents use snow_encode_base64 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.
Why snow_encode_base64 is rated Medium
Base64 encoding is a reversible transformation that prepares data for transmission or storage. While local and not inherently destructive, it modifies data in a way that enables subsequent Write operations (like attachment uploads). The tool itself does not execute queries, delete data, or move money.
From the tool's definition Encodes a UTF-8 string as Base64 'for embedding binary-ish data in JSON payloads (e.g. attachment uploads)'. The description indicates this transforms and prepares data for upload/submission.
Attacks that exploit this kind of access
The rule that runs snow_encode_base64 safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Serac, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For snow_encode_base64, this is the rule to start with:
snow_encode_base64 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 Serac, apply this rule, and every snow_encode_base64 call is checked against it from then on.
Questions about snow_encode_base64
Encode a UTF-8 string as Base64. Local operation — no ServiceNow call. Handy for embedding binary-ish data in JSON payloads (e.g. attachment uploads). 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_encode_base64: 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_encode_base64 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_encode_base64 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_encode_base64. 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_encode_base64 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.
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