See also: Semantic web. RDF, OWL, https://solidproject.org/TR/protocol . It's the original intent of Tim-Berners Lee, the man who invented the web.
Knowing who to trust is as hard a problem as basic understanding / semantics.
You might trust your banker with your money but not your personal life, and trust your friend with your personal life but not your bank account.
Therefore, you there must be explicit and implicit degrees of trust that are specifically trust "for some intention" or at even just "for some specific purpose." And then, you must trust that the meaning of any promise or guarantee is equivalent between parties.