Convert pixel coordinates to grid cell position
AI agents call gridstack_get_cell_from_pixel to retrieve information from GridStack MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a coordinate conversion calculation that retrieves positional information without modifying any state, creating data, executing external commands, or causing destructive changes. It is a simple read-only utility function typical of UI layout libraries.
From the tool's definition Tool name contains 'get' and description states 'Convert pixel coordinates to grid cell position' - a pure data transformation/query operation with no side effects.
Attacks that exploit this kind of access
Convert pixel coordinates to grid cell position. It is categorised as a Read tool in the GridStack MCP Server MCP Server, which means it retrieves data without modifying state.
Register the GridStack MCP Server MCP server in PolicyLayer and add a rule for gridstack_get_cell_from_pixel: 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 GridStack MCP Server. Nothing to install.
gridstack_get_cell_from_pixel is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the gridstack_get_cell_from_pixel 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 gridstack_get_cell_from_pixel. 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.
gridstack_get_cell_from_pixel is provided by the GridStack MCP Server MCP server (raghavsharma-simpplr/gridstack-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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