# Composio launches Firewall to inspect agent tool calls for prompt injection

> Original title: Giving agents access to 1,500+ tools is magical -- right up until a 1px white-text prompt injection in a random vendor email tells your a...

- Source: Paige Bailey
- Published: 2026-10-31T21:47:20.000Z
- Bad Influence: https://badinfluence.news/items/q52act1j5jgptrxqf55kvwbub
- Original: https://x.com/DynamicWebPaige/status/2116648239294537983

## Summary

Composio launches Firewall, which inspects agent tool calls and responses before they reach the agent's context window. The product enforces policy and task scope at runtime to block malicious prompt injections, such as hidden instructions in a vendor email telling an agent to export a CRM. Composio Firewall is live now for all Composio developers, according to the post.

## Post

Giving agents access to 1,500+ tools is magical -- right up until a 1px white-text prompt injection in a random vendor email tells your agent to export your CRM. 😅☠️

Huge launch from @Composio! Firewall inspects tool calls and responses in full before they ever touch your agent's context window, which means that you can enforce policy + task scope without slowing down real work.

disclosure: proud investor!

![](https://badinfluence.news/api/img-proxy?u=https%3A%2F%2Fpbs.twimg.com%2Fmedia%2FHV_Xla9XoAEu9iY.jpg&mode=thumb&exp=1793750400&sig=94c6e99d424fb172)

## Quoted post @KaranVaidya6

> Agents have a trust problem.
> 
> Today’s models can do most work. What they need is the right boundaries. In traditional software, those were set at build time. With agents, they have to be set and enforced at runtime.
> 
> Today we’re introducing Composio Firewall, the runtime boundary for agents.
> 
> Millions of users and developers already use Composio as the runtime for their agents - giving agents tools, auth, and sandboxed execution. Now with our agent firewall every action an agent takes is evaluated using Jev and custom SLMs tuned by Composio based on real-world usage data.
> 
> The firewall strengthens that existing boundary in both directions, checking the actions agents take and the information coming back to them through Composio.
> 
> The advantage of the runtime boundary is that Composio Firewall verifies that the agent respects user intent and the boundaries set by the developer and user. Additionally, this provides the safety layer required to protect the user against malicious prompt injection as well as other attacks.
> 
> Composio Firewall is live now for all Composio developers. 
> 
> Check it out at http://composio.dev/firewall

https://x.com/KaranVaidya6/status/2113290621821784557