MCP SECURITY

Secure MCP from connection to action.

MCP can give AI agents access to powerful tools and enterprise systems. Eyrane helps security teams discover MCP connections, understand the identities and permissions behind them, and control sensitive tool actions before they execute.

MCP ACTION PATH CONCEPTUAL VIEW · SYNTHETIC
EYRANE DECISIONREVIEWHigh-impact payment action requires approval.

DISCOVER

See every MCP server and tool your agents can reach.

MCP connections can appear across developer workflows, SaaS applications, internal agents, and third-party services. Eyrane gives security teams a view of which MCP servers exist, which agents use them, and what capabilities they expose.

Explore Agent Discovery
MCP serversConnected agentsTools + resourcesOwnersEnvironmentsDownstream systems

UNDERSTAND

Know the authority behind every MCP tool.

An agent may not directly hold the downstream credential. But if it can invoke an MCP tool that acts through that credential, it can effectively exercise those permissions.

Effective access includes permissions exercised indirectly through tools.

Explore Agent Identity & Permissions

Agent → MCP server → tool → credential → role → system → data or action

TOOL CAPABILITIES

Understand what every tool can actually do.

Two tools exposed by the same MCP server can carry very different levels of risk. Capability, identity, resource, and action all matter.

MCP SERVER / CUSTOMER OPERATIONSCAPABILITY
Search CustomerRead
Update CustomerWrite
Export CustomersBulk export
Delete CustomerDestructive

CONTROL

Decide what happens before the tool executes.

A valid MCP connection does not mean every tool action should execute automatically. Eyrane is focused on applying security context at the moment an agent attempts a sensitive action.

Explore Runtime Security
AGENTWhich agent is acting?
IDENTITYWhich credential is behind it?
TOOLWhich capability is invoked?
RESOURCEWhat system or data is affected?
ACTIONRead, write, export, execute, or delete?
ENVIRONMENTDevelopment or production?
ALLOWREVIEWBLOCK

IDENTITY PATH

The credential may be hidden. The authority is not.

The model or agent may never see the raw downstream credential. But the agent can still use its authority through the tool.

This is why MCP security must include downstream identity, permission scope, ownership, reachable systems, and effective authority.

AGENT↓MCP SERVER↓TOOL↓SERVICE ACCOUNT↓PRODUCTION CRM

TRUST CONTEXT

Make every MCP trust relationship explicit.

MCP servers may be internal, open source, third-party, locally hosted, remotely hosted, experimental, or production. Trust should be understood in context.

APPROVEDKnown ownerReviewed tools and managed credentials
REVIEWIncomplete contextKnown connection, but an open security question
UNTRUSTEDUnknown authorityUnknown owner, permissions, or capabilities

THIRD-PARTY MCP

Understand the risk behind third-party MCP servers.

Third-party does not automatically mean unsafe. It means the trust boundary should be explicit.

Security teams should understand who operates the server, where data goes, what tools it exposes, what credentials it uses, and which systems it can reach.

  • Who operates this server?
  • Where does data go?
  • What credentials are used?
  • What systems are reachable?
  • Who owns the connection internally?
  • What happens if the server changes?

CONTENT + MCP

Stop manipulated content from becoming a privileged tool action.

The security boundary should not end when the MCP connection is trusted. Runtime policy should still evaluate what an agent attempts after it processes tool output.

UNTRUSTED MCP RESPONSE↓AGENT INTERPRETS CONTENT↓SENSITIVE ACTION REQUESTED↓ALLOW / REVIEW / BLOCK

TOOL MISUSE

A trusted tool can still be used unsafely.

The server may be trusted. The tool may be legitimate. The action may still be wrong for the task.

The question is not only whether the agent can call the tool, but whether it should call it now.

Explore Tool Misuse
TASKLook up invoice status↓TOOL REQUESTEDExport all customer invoicesLegitimate tool. Wrong action for the task.

MULTI-TOOL CHAINS

Risk can emerge across a sequence of tools.

Each action can appear legitimate individually. The combined workflow may create data loss or a policy violation.

Explore Data Exfiltration
01Query customer records
02Generate report
03Create file
04Upload file
05Send external link
Potential data-exfiltration path

HUMAN CONTROL

Keep people in control of high-impact tools.

Not every tool call needs approval. Higher-impact actions may need a review point before execution.

ILLUSTRATIVE POLICYFinance Agent → Issue Payment
AMOUNT$75,000
IDENTITYpayment-service
DECISIONREVIEW

MCP ACTIVITY

Trace the action across the full MCP path.

Security teams should be able to connect the initiating agent, MCP server, tool, downstream identity, affected system, policy, approval, and outcome.

ILLUSTRATIVE ACTION TRAIL
14:03:12Query AccountALLOW
14:03:18Export RecordsREVIEW
14:04:01Approval deniedSTOPPED

THE EYRANE MODEL

Discover. Understand. Control.

01DiscoverFind MCP servers, tools, and connected agents.
02UnderstandMap identities, credentials, permissions, data, and downstream access.
03ControlApply policy before sensitive tool actions execute.

COMMON QUESTIONS

Questions about Eyrane and MCP security

What does Eyrane secure across MCP?

Eyrane’s MCP security model follows the path from agent to MCP server, tool, credential, enterprise system, and requested action so security teams can understand access and apply control in context.

Why do MCP credentials matter?

MCP credentials determine what a tool can reach downstream. An agent may not hold the raw credential, but it can still exercise its authority through the tool.

Can an agent exercise permissions through an MCP tool?

Yes. If an MCP tool acts through a credential or role, the agent may effectively exercise the permissions available through that tool.

How does Eyrane approach MCP runtime security?

Eyrane evaluates sensitive MCP actions using context such as the agent, identity, tool, resource, data, environment, and autonomy, then supports an allow, review, or block decision model.

How does MCP security relate to AI agent identity?

MCP security extends agent identity analysis downstream by mapping the credentials, roles, permissions, and systems behind each tool.

How does Eyrane handle high-impact MCP actions?

High-impact actions can be treated as review points rather than automatic execution, depending on the policy and context applied by the organization.

MCP SECURITY

Secure every path from agent to tool to action.

Understand MCP servers, tools, credentials, permissions, and downstream access before sensitive actions reach enterprise systems.

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