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What sympy_Nor does on Pypi:mcp Sympy
AI agents invoke sympy_Nor to trigger actions in Pypi:mcp Sympy. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why sympy_Nor is rated High
This tool computes a logical NOR operation using SymPy's symbolic mathematics engine. It executes a computation but has no side effects, no data modification, and no destructive capability. It's slightly above Read because it runs a computation/expression evaluation rather than simply retrieving stored data. Severity is low as misuse is limited to incorrect symbolic logic results.
From the tool's definition Logical NOR - executes a symbolic logic operation via SymPy
Attacks that exploit this kind of access
The rule that runs sympy_Nor safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Pypi:mcp Sympy, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For sympy_Nor, this is the rule to start with:
sympy_Nor stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Pypi:mcp Sympy, apply this rule, and every sympy_Nor call is checked against it from then on.
Questions about sympy_Nor
Logical NOR. It is categorised as a Execute tool in the Pypi:mcp Sympy MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Pypi:mcp Sympy MCP server in PolicyLayer and add a rule for sympy_Nor: 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 Pypi:mcp Sympy. Nothing to install.
sympy_Nor 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 sympy_Nor 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 sympy_Nor. 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.
sympy_Nor is provided by the Pypi:mcp Sympy MCP server (pypi:mcp-sympy). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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