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What sympy_sum does on Pypi:mcp Sympy
AI agents invoke sympy_sum 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_sum is rated High
This tool executes a symbolic mathematics computation via SymPy. While it appears benign (summing expressions), it runs arbitrary SymPy code that could involve complex or resource-intensive symbolic evaluation. It does not read persistent data, write/modify state, or have financial/destructive implications, placing it in Execute.
From the tool's definition 'Compute a sum' — triggers SymPy symbolic computation engine to evaluate potentially complex summations
Attacks that exploit this kind of access
The rule that runs sympy_sum 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_sum, this is the rule to start with:
sympy_sum 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_sum call is checked against it from then on.
Questions about sympy_sum
Compute a sum. 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_sum: 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_sum 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_sum 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_sum. 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_sum 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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