ipynb_get_cell
AI agents call ipynb_get_cell to retrieve information from Jupyter Editor without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'get' prefix and context within a notebook editor MCP server strongly indicates this retrieves cell data without modification. Although the description is empty (lowering confidence slightly), the naming convention and sibling tools (all named with 'get_' or read-only operations like 'extract_cells', 'filter_cells') support classification as a read-only operation with low severity.
From the tool's definition Tool name 'ipynb_get_cell' with 'get' prefix is a retrieval operation. Sibling tools include 'ipynb_get_metadata' and 'ipynb_get_notebook_info' which are clearly read operations.
Attacks that exploit this kind of access
ipynb_get_cell. It is categorised as a Read tool in the Jupyter Editor MCP Server, which means it retrieves data without modifying state.
Register the Jupyter Editor MCP server in PolicyLayer and add a rule for ipynb_get_cell: 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 Jupyter Editor. Nothing to install.
ipynb_get_cell 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 ipynb_get_cell 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 ipynb_get_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.
ipynb_get_cell is provided by the Jupyter Editor MCP server (jsamuel1/jupyter-editor-mcp). 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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