š Render a Mermaid diagram and insert it INSIDE a specific table cell (HWPX only). Uses mermaid.ink API. ā ļø IMPORTANT: Use this tool (NOT render_mermaid) when inserting diagrams into table cells! When to use: 1. find_insert_position_after_header returned found_in='table_cell' ā use table_info ...
High parameter count (11 properties); Single-target operation
Part of the Hwpx MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents use render_mermaid_in_cell to create or modify resources in Hwpx. 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 render_mermaid_in_cell repeatedly, creating or modifying resources faster than any human could review. Intercept's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Hwpx.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
tools:
render_mermaid_in_cell:
rules:
- action: allow
rate_limit:
max: 30
window: 60See the full Hwpx policy for all 135 tools.
Agents calling write-class tools like render_mermaid_in_cell have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Write risk category across the catalogue. The same policy patterns (rate-limit, validate) apply to each.
š Render a Mermaid diagram and insert it INSIDE a specific table cell (HWPX only). Uses mermaid.ink API. ā ļø IMPORTANT: Use this tool (NOT render_mermaid) when inserting diagrams into table cells! When to use: 1. find_insert_position_after_header returned found_in='table_cell' ā use table_info (table_index, row, col) 2. You want to add a diagram to a specific cell you already know How to get table_index: - From find_insert_position_after_header result: table_info.table_index - Or use get_table_map to list all tables and find the index Positioning within cell: - By default, diagram is inserted at the beginning of the cell - Use after_text to insert the diagram after a specific paragraph containing that text. It is categorised as a Write tool in the Hwpx MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Add a rule in your Intercept YAML policy under the tools section for render_mermaid_in_cell. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Hwpx MCP server.
render_mermaid_in_cell 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 render_mermaid_in_cell rule in your Intercept 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 Intercept policy for render_mermaid_in_cell. 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_in_cell is provided by the Hwpx MCP server (hwpx-mcp-server). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic policy on every MCP tool call. Per-identity grants. Full audit log.