Question 1

What is anlyon.dev?

Accepted Answer

anlyon.dev is a registry that puts nutrition labels on the MCP ecosystem—tagging 192k tools across 15k servers as Read, Write, Irreversible, or Destructive so you can assess blast radius before connecting.

Question 2

What do the MCP labels mean?

Accepted Answer

Read tools fetch data without side effects; Write tools mutate state; Irreversible tools take actions that cannot be undone; Destructive tools can cause serious damage—deletions, overwrites, and similar.

Question 3

Does labeling replace runtime tool-call guards?

Accepted Answer

No—labels inform your choices at connect time; guards like Agent Tool-Call Guard enforce policy at call time. The strongest setups use both.

Question 4

Is anlyon.dev free?

Accepted Answer

Yes—the label registry is free to browse at anlyon.dev.

anlyon.dev: Read the Label Before Your Agent Eats the MCP Shelf

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