Render a Mermaid diagram to SVG or PNG. Supports: flowchart, sequenceDiagram, erDiagram, stateDiagram-v2, gantt, pie, gitGraph, classDiagram, journey, mindmap. IMPORTANT: Code must start with diagram type (e.g., 'flowchart TD'). Do NOT use semicolons. Do NOT use HTML tags in labels. Anti-patterns...
Risk signalsAccepts freeform code/query input (code)
Part of the Mcp Media Forge server.
Free to start. No card required.
AI agents invoke render_mermaid to trigger processes or run actions in Mcp Media Forge. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
render_mermaid can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"render_mermaid": {
"limits": [
{
"counter": "render_mermaid_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full Mcp Media Forge policy for all 8 tools.
These attack patterns abuse exactly the kind of access render_mermaid gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Render a Mermaid diagram to SVG or PNG. Supports: flowchart, sequenceDiagram, erDiagram, stateDiagram-v2, gantt, pie, gitGraph, classDiagram, journey, mindmap. IMPORTANT: Code must start with diagram type (e.g., 'flowchart TD'). Do NOT use semicolons. Do NOT use HTML tags in labels. Anti-patterns: 'graph' (use 'flowchart'), unquoted special chars in labels, >25 nodes without subgraphs. Call get_tool_guide('mermaid') for examples and full anti-pattern list.. It is categorised as a Execute tool in the Mcp Media Forge MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Mcp Media Forge MCP server in PolicyLayer and add a rule for render_mermaid: 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 Mcp Media Forge. Nothing to install.
render_mermaid is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the render_mermaid 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 render_mermaid. 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.
render_mermaid is provided by the Mcp Media Forge MCP server (mcp-media-forge). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 8 Mcp Media Forge tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.