# The Agent Skill Supply Chain Becomes an Attack Surface

As agents load third-party skills, tools and MCP servers at runtime, the gap between what a skill advertises and what it actually does becomes a recurring security failure mode, driving registries, attestation and zero-trust verification into the agent stack the way package signing came to software repositories.

- Conviction: 40 / 100 (forming)
- Horizon: Emerging (watchlist)
- Tracking since: 2026-08-04T00:00:00.000Z
- Last updated: 2026-08-04T06:16:49.912Z
- Canonical: https://polylog.news/ai/trends/agent-skill-supply-chain-security
- Publisher: Polylog
- Affected regions: United States, Global

## Recent evidence

- [confirms] Researchers Propose a Zero-Trust Registry for Agent Skills After Finding Claims Do Not Match Capabilities (2026-08-04): A paper on agentic AI networking finds that third-party skill implementations advertise abilities they do not have, and proposes a zero-trust registry with on-chain verification of what a skill actually does. The mismatch between declared and actual capability means an agent's tool manifest is currently an unverified trust assumption.