Insert a real DIAGRAM (BPMN, Diagrams-as-Code / any DSL: mermaid, d2, plantuml, graphviz, …) into a whiteboard as an editable SB diagram element. Provide documentId, diagramType (call listDiagramTypes / getDiagramTypeGuide), and source (the DSL). The diagram is rendered to an image stored like a ...
Part of the Stable Baseline server.
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AI agents use insertWhiteboardDiagram to create or modify resources in Stable Baseline. 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 insertWhiteboardDiagram repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Stable Baseline.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"insertWhiteboardDiagram": {
"limits": [
{
"counter": "insertwhiteboarddiagram_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Stable Baseline policy for all 184 tools.
These attack patterns abuse exactly the kind of access insertWhiteboardDiagram gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Insert a real DIAGRAM (BPMN, Diagrams-as-Code / any DSL: mermaid, d2, plantuml, graphviz, …) into a whiteboard as an editable SB diagram element. Provide documentId, diagramType (call listDiagramTypes / getDiagramTypeGuide), and source (the DSL). The diagram is rendered to an image stored like a pasted image, and its editable source is kept in a sidecar so it stays a live, re-openable diagram on the board (double-click on the canvas opens the BPMN / code / AI editor). Options: caption (label beneath it), width/height to size it, and x/y or align ('left'|'center'|'right') to place it (defaults to the right of existing content). After inserting, call getWhiteboardImage to see it and verify it rendered correctly (fix the source and re-insert if it is wrong). For a plain picture (not a diagram) use insertWhiteboardImage; to generate a diagram image WITHOUT inserting use renderDiagram.. It is categorised as a Write tool in the Stable Baseline MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Stable Baseline MCP server in PolicyLayer and add a rule for insertWhiteboardDiagram: 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 Stable Baseline. Nothing to install.
insertWhiteboardDiagram 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 insertWhiteboardDiagram 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 insertWhiteboardDiagram. 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.
insertWhiteboardDiagram is provided by the Stable Baseline MCP server (https://api.stablebaseline.io/functions/v1/cloud-serve/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 184 Stable Baseline tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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