Hey everyone. I've been diving into this whole WASM-as-a-sandbox thing for agent tools, inspired by a lot of the discussions here. I'm pretty new to the deeper security aspects, so I wanted to start with something concrete I could actually do.

I took 100 random WASM modules—mostly from the plugin repositories for various agent frameworks and some common tooling ones (like those for data parsing or external API calls). I ran them through a bunch of static analysis tools (`wasm-analyzer`, `twiggy`, and a custom script using `wasmparser` to look for certain risky patterns). I was fully expecting to find at least a few classic memory safety issues, like out-of-bounds access patterns or type confusion hints.

The result kind of surprised me: zero. I mean, zero memory safety bugs flagged. The tooling found some inefficiencies and large unused sections, but nothing that looked like a clear path to corrupting memory or breaking the sandbox from *inside* the WASM. It makes sense in a way, since the whole linear memory model and explicit bounds checks are baked in.

So my question is... does this mean the isolation story is basically solved for these kinds of self-contained tools? Or am I missing the point entirely? I know there's been talk about type system holes, or attacks that jump between modules, or even flaws in the runtimes themselves (like Wasmtime or wasmedge). My little analysis wouldn't catch any of that.

I'm nervous I might be falling into a "security theater" trap by just looking at the modules in isolation. For those of you running agents in production with WASM sandboxes, where do the *actual* worries come from? Is it the host bindings? The syscalls you allow? Or is the static analysis result I got actually a good sign for basic tool isolation?