Introduces a sympy variable with specified assumptions and stores it.
AI agents use intro to create or update resources in Symbolic Algebra MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Symbolic Algebra MCP Server environment.
This tool creates and persists a new symbolic variable in the SymPy system with specified mathematical assumptions. This is a reversible write operation—the variable can be redefined or cleared without permanent consequences. It does not execute arbitrary code, delete data, or access external systems. The impact is limited to the local symbolic algebra session, making it low severity even though it modifies state.
From the tool's definition The tool description states it 'Introduces a sympy variable with specified assumptions and stores it.' The verb 'stores' indicates data creation/modification within the symbolic algebra context.
Documented attack patterns abuse exactly the kind of access intro gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Symbolic Algebra MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for intro:
{
"version": "1",
"default": "deny",
"tools": {
"intro": {
"limits": [
{
"counter": "intro_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}intro stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Introduces a sympy variable with specified assumptions and stores it. It is categorised as a Write tool in the Symbolic Algebra MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Symbolic Algebra MCP Server MCP server in PolicyLayer and add a rule for intro: 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 Symbolic Algebra MCP Server. Nothing to install.
intro 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 intro 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 intro. 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.
intro is provided by the Symbolic Algebra MCP Server MCP server (sdiehl/sympy-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 32 Symbolic Algebra MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
32 Symbolic Algebra MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.