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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteAI agents can use connected apps safely only when their access and actions are carefully limited—and even then, connecting an app carries risk. Before you approve a connection, check what the agent can read or change, whether it can act without your confirmation, how it handles credentials, and how to revoke access. Treat emails, documents, web pages, and other content it reads as potentially hostile: they can contain instructions intended to manipulate the agent.
What can go wrong when an agent uses an app?
An agent can act through the tools and permissions its connection provides. If it can send email, change files, or manage settings, a mistaken or manipulated decision could have consequences beyond producing a bad answer.
One specific risk is prompt injection, also called agent hijacking: malicious instructions are placed in content the agent reads, such as an email or web page, in an attempt to make it ignore the user’s intent or take an unintended action. NIST describes this as a failure to separate trusted instructions from untrusted data in its January 2025 guidance on agent hijacking. A system prompt or benign request alone cannot guarantee that outside content will not manipulate an agent. Security boundaries should therefore come from limited permissions and controls outside the model’s reasoning, not just instructions telling it to behave.
OWASP also identifies tool abuse, data exfiltration, memory poisoning, excessive autonomy, and sensitive-data exposure as risks in its AI Agent Security Cheat Sheet. These are risk categories, not a claim that every agent or app integration has the same weaknesses.
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What should you check before connecting an app?
- Define the task and its minimum access. Name the app, the information the agent needs, and the actions required. For example, an agent summarizing selected incoming messages may need permission to read those messages, but not to send or delete email or access unrelated accounts. OWASP recommends limiting tools and permissions to what each task needs, including by action and resource.
- Inspect the consent screen. Look for separate permissions to read, create, edit, send, delete, or administer, and note which mailbox, folder, workspace, or other resources each covers. If access is bundled broadly or the screen is unclear, pause and check the provider’s documentation for a narrower option. Scope names and available controls vary by app and integration; no specific consumer app’s current consent screen is established here.
- Choose read-only access when reading is enough. OWASP’s LLM06:2025 Excessive Agency guidance uses an email assistant that only summarizes incoming messages as an example, and points to read-only OAuth access as a way to avoid unnecessary permissions. Read-only limits what the agent can change, but does not prevent sensitive information from being exposed in its output or logs.
- Require independent approval for consequential actions. Look for a confirmation or policy gate before the agent sends a message, shares a file, deletes data, makes a purchase, changes settings, or performs administrative work. The approval should name the action and target, and should come from a person or separate policy control—not from the agent approving itself. OWASP calls for explicit authorization of sensitive operations.
- Understand the credential and token. Find out whether the connection relies on a delegated account, API key, bearer token, or another credential; what access it carries; who can access it; how long it remains valid; and how to revoke or rotate it. NIST’s 2026 identity guidance warns that API keys and bearer tokens carried between tools and networks can be exposed or misused. The appropriate implementation depends on the service, so do not assume all integrations protect credentials the same way.
- Locate the disconnect and access-review controls. Before granting access, find the app’s authorized-integrations page and the agent’s disconnect control. After a trial or task, decide whether the connection is still needed and remove it if not. OWASP recommends reviewing permissions periodically to catch privilege creep; the exact revocation path depends on the app and agent.
- Check oversight and records, especially for work use. Determine whether a person must approve sensitive actions and whether the service records what the agent accessed and did. Official guidance supports authorization and oversight, but it does not establish that every consumer agent provides complete audit logs.
How to compare agent integrations
For any product, verify the current documentation and the actual consent screen rather than assuming that a feature is available. These criteria follow security guidance; they are not a tested ranking of vendors.
- Permission granularity: Can you limit access by action—such as read, write, send, or delete—and by resource, such as a particular mailbox, folder, workspace, or record?
- Credential controls: Are credentials scoped and manageable, and can you revoke access? Check the product’s own explanation rather than assuming how tokens are handled.
- Action oversight: Is a separate confirmation required for sensitive actions? Can an administrator enforce that boundary?
- Input and tool boundaries: Can the service constrain how external content influences the agent and which tools it may call?
When should you hold off?
Do not approve a connection until you understand its scope and can identify how to remove it. In particular, pause if the integration requests broad access for a narrow task, offers no clear way to limit sensitive actions, or leaves you unable to tell how its credentials are managed. For higher-impact work, use an agent only when the necessary authorization and oversight controls are available and independently enforced.
The Australian Cyber Security Centre’s 2026 agentic AI security prerequisites emphasize least privilege, secure protocols, safe defaults, and threat modelling before adoption. Those principles apply to organizational deployments as well as personal decisions, though the right controls depend on the app, account, and task.
Permissions, token handling, and approval interfaces change over time. Recheck the provider’s current documentation and the exact consent screen when you connect, and revisit access if the product changes.
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