Checked fact 240123 Oct 2026Agents and apps

The optional fields are license, compatibility, metadata and allowed-tools.

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The exact words it rests on

licenseNoLicense name or reference to a bundled license file. compatibilityNoMax 500 characters. ... metadataNoArbitrary key-value mapping ... allowed-toolsNoSpace-separated string of pre-approved tools the skill may use. (Experimental)

What the source said when we opened it, on 23 Oct 2026.

The source

Agent Skills specification
Agent Skills project

Open the source archived copy

Checked

Checked by the notis newsroom on 23 Oct 2026, against the source above.

In the story

How an agent loads a skill in three steps 23 Oct 2026

Cite this fact

Short permanent address

In a sentence

“The optional fields are license, compatibility, metadata and allowed-tools.” ai notis, checked 23 Oct 2026. Source: Agent Skills specification (Agent Skills project). https://ainotis.com/c/2401

As a reference (APA style)

ai notis. (2026, October 23). The optional fields are license, compatibility, metadata and allowed-tools [Checked claim 2401]. ai notis. https://ainotis.com/c/2401

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