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Risk signalsAccepts raw HTML/template content (content) · Accepts file system path (filename)
Part of the Prismism server.
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AI agents use prismism_publish to create or modify resources in Prismism. 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 prismism_publish 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 Prismism.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"prismism_publish": {
"limits": [
{
"counter": "prismism_publish_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Prismism policy for all 8 tools.
These attack patterns abuse exactly the kind of access prismism_publish 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.
Upload a file and get a shareable, tracked link. Supports PDF, HTML, Markdown, images (PNG/JPG/GIF/SVG/WebP), and video (MP4). Send content as plain text (default) or base64 for binary files.. It is categorised as a Write tool in the Prismism MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Prismism MCP server in PolicyLayer and add a rule for prismism_publish: 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 Prismism. Nothing to install.
prismism_publish 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 prismism_publish 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 prismism_publish. 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.
prismism_publish is provided by the Prismism MCP server (@prismism/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 8 Prismism tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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