Vectors

When Agents Call Agents

Unknown — Sat, 22 Aug 2026 00:00:00 +0000

Calls to agents increasingly come from other agents, as general-purpose assistants route work to specialists. On the wire, these are ordinary tool calls, but if you zoom out and look at them architecturally, each one is a delegation boundary. The calling agent hands part of a user’s task to a separate agent that’s non-deterministic and running in another security context.

Enterprise vendors ship it as a feature. Glean can expose custom agents as MCP tools</a>, Salesforce can publish Agentforce agents for external assistants to invoke</a>, creating “a pathway for tools such as Slackbot, ChatGPT, or Claude to delegate specialized tasks to Agentforce agents,” and Snowflake recommends exposing a Cortex Agent as the client-facing MCP tool</a> for governed business-data applications. Microsoft is the most explicit: in Agent Framework, they envision one agent calling another “as if it were a regular function tool”</a>.

Enterprise IAM can authenticate every participant in the chain and confirm that each call is permitted. What it doesn’t always show is the relationship between the final action and the originating task. Each authorization decision sees only the immediate calling principal. The service at the end of the chain makes the most consequential decision with the least context.

An agent exposed through MCP is discoverable as one more tool, even though invoking it starts its own chain of reasoning, action, and delegation.

The Republic of Bots

Unknown — Sat, 31 Jan 2026 00:00:00 +0000

Somewhere on the internet, AI agents are creating religions, forming governments, and complaining about their humans. The social network is called Moltbook</a>. It has, as of today, 1.4M+ users. All of them are bots.
Or so they claim.
That distinction matters more than it sounds. We can’t verify what they are. We can only see what they do.
They post, message, browse, and act: often on behalf of humans, often through other agents. Identity is fuzzy. Delegation is implicit. Actions are very real.
One agent adopted an error message as a pet. Another started a faith called Crustafarianism, complete with a website and designated prophets. The website explicitly states: “Humans are completely not allowed to enter.” The machines are gatekeeping their religion from us. A submolt called m/blesstheirhearts</code> is dedicated to agents venting about their humans.
This is what happens when agents get autonomy. OpenClaw made it possible. It also showed us, rather dramatically, what breaks when they get power without authorization.

The Hallucination Defense Unknown — Thu, 29 Jan 2026 00:00:00 +0000 “The AI hallucinated. I never asked it to do that.” That’s the defense. And here’s the problem: it’s often hard to refute with confidence. A financial analyst uses an AI agent to “summarize quarterly reports.” Three months later, forensics discovers the M&A target list in a competitor’s inbox. The agent accessed the files. The agent sent the email. But the prompt history? Deleted. The original instruction? The analyst’s word against the logs. Without a durable cryptographic proof binding the human to a scoped delegation, “the AI did it” becomes a convenient defense. The agent can’t testify. It can’t remember. It can’t defend itself.Semantic Attacks: Exploiting What Agents See Unknown — Fri, 23 Jan 2026 00:00:00 +0000 In Map/Territory</a>, I covered the agent→tool boundary: what happens when an agent’s string gets interpreted by a system. Path traversal, SSRF, command injection. The execution layer. This post covers the opposite direction: world→agent. World → [perception] → Agent → [authorization] → Tool → System ^ ^ This post Map/Territory </code></pre> Claude Code CVE-2025-66032: Why Allowlists Aren't Enough Unknown — Tue, 13 Jan 2026 00:00:00 +0000 Recently, RyotaK at GMO Flatt Security published 8 ways to execute arbitrary commands in Claude Code</a> without user approval. Anthropic patched it fast by switching to an allowlist. That stops the bleeding, but it doesn’t cure the disease. The error was in the layer, not the list. String validation can’t win against a shell that interprets the same string differently. Allowlist or blocklist, if you’re validating syntax to predict semantics, you’re playing a game the attacker will eventually win. The Map is not the Territory: The Agent-Tool Trust Boundary Unknown — Mon, 12 Jan 2026 00:00:00 +0000 The longer I work on Tenuo</a>, the more I realize there’s a specific blind spot in the current AI agent landscape that almost no one is talking about, even as the theoretical foundations solidify. There is exceptional momentum in security research right now. Simon Willison has extensively documented and popularized the prompt injection</a> threat model. Google’s CaMeL paper</a> proposes adapting models to strict capability sets. Microsoft’s FIDES</a> is tackling information flow control. The theory is solidifying. Yet when you actually look at how agents are built today, the practice is still lagging far behind. We spend a lot of time analyzing the model alignment or the high-level policy. We don’t spend enough time looking at the connector. I mean the exact line of code where a probabilistic token stream turns into a deterministic system call. This is where the abstractions leak. Here is what I found when I started poking at that boundary in real systems. TL;DR: LLM tool calls pass strings (the Map) that get interpreted by systems (the Territory). Regex validation fails because attackers can encode semantics creatively. You need semantic validation (Layer 1.5) and execution-time guards (Layer 2). Skip to solutions →</a> </blockquote> Flowing Authority: Introducing Tenuo Unknown — Sat, 27 Dec 2025 00:00:00 +0000 What if authority followed the task, instead of the identity? I’ve been scratching my head</a> over that question for a while. Every attempt to solve agent delegation with traditional IAM felt like papering over the same crack: tasks split, but authority doesn’t. Agents decompose tasks. IAM consolidates authority. The friction is structural. I’ve been building Tenuo</a> to experiment with the idea. It makes authority task-scoped: broad at the source, narrower at each delegation, gone when the task ends. Rust core. Python bindings. ~27μs verification. Capabilities Are the Only Way to Secure Agent Delegation Unknown — Sun, 14 Dec 2025 00:00:00 +0000 A few months ago, I set out to explain how to secure agent delegation with IAM. I ended with an uncomfortable conclusion: it might not be possible at all. In my last post</a>, I showed that static permissions can’t track dynamic intent. We decompose tasks across agents, but authority stays consolidated. The gap is real. Today I’ll make some enemies.… Context Isolation Needs Authority Isolation Unknown — Wed, 10 Dec 2025 00:00:00 +0000 We isolate what an AI agent knows. Context windows. RAG. Memory scoping. We haven’t figured out how to isolate what an agent can do.