Create atomic/crystal structure from formula, CIF, or XYZ data.
AI agents use create_structure to create or update resources in Abacus — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Abacus environment.
This tool creates or initializes computational structure objects used as inputs for downstream scientific calculations. Creation of data structures is a Write operation. While it modifies state, the action is reversible (structures can be modified or replaced), no irreversible deletions occur, no code is executed against external systems, and no financial or destructive operations are performed.
From the tool's definition Tool name 'create_structure' and description 'Create atomic/crystal structure from formula, CIF, or XYZ data' indicates generation of new computational chemistry structure data that is reversible and does not execute calculations, delete data, or move…
Documented attack patterns abuse exactly the kind of access create_structure gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Abacus, and nothing reaches the server without passing your rules. This is the rule we recommend for create_structure:
{
"version": "1",
"default": "deny",
"tools": {
"create_structure": {
"limits": [
{
"counter": "create_structure_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_structure 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.
Free to start. No card required.
Create atomic/crystal structure from formula, CIF, or XYZ data. It is categorised as a Write tool in the Abacus MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Abacus MCP server in PolicyLayer and add a rule for create_structure: 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 Abacus. Nothing to install.
create_structure 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 create_structure 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 create_structure. 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.
create_structure is provided by the Abacus MCP server (phelanshao/abacus-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Abacus, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
22 Abacus tools catalogued and risk-classified — across an index of 43,000+ MCP servers.