What goes wrong with over-broad MCP scopes?
In short: Over-broad scopes give an agent more access than its task needs, and OWASP notes that loose permissions expand over time. A stolen or misused token then reaches far more than intended. A gateway mitigates it with task-scoped, short-lived access and policy that keeps agents within the permissions of the person they act for.
What happens?
An agent is granted a wide scope for convenience.
Later the same token is used for actions nobody intended, such as repository changes.
How does a gateway mitigate it?
- Issue task-scoped, short-lived credentials.
- Keep agents within the permissions of the person they act for.
- Request minimal scopes and step up only when needed.
Which scored gateways document a mitigation?
| Gateway | Documented control | Source |
|---|---|---|
| NewCore | Short-lived, task-scoped access; agents stay within the person's permissions. | [nc-secure] |
| Mintive | Each agent gets only the permissions its work needs. | [mint-home] |
| Silverfort | Removes standing privileges for agents using static API keys. | [sf-ai] |
Facts only. A gateway missing here may still mitigate the threat; we list what its public pages document.
Sources
- OWASP MCP Top 10 [owasp-mcp] read 2026-11-03
- MCP spec: Security best practices [mcp-sec] read 2026-11-03
- NewCore: Secure [nc-secure] read 2026-11-03
- MintMCP home (now Mintive) [mint-home] read 2026-11-03
- Silverfort AI agent security [sf-ai] read 2026-11-03
All eight threats are listed on the threats hub.
By The Datasheet desk · Published and reviewed 2026-11-03