Contextual titles based on temporal proximity and shared topics of related communication items with sensitivity policy

A computer system, comprising:

• one or more processors;
• and
• computer memory having computer-readable instructions embodied thereon, that, when executed by at least one processor of the one or more processors, causes the computer system to perform operations comprising:
• accessing a plurality of communication items and a target communication item of a communication application;
• determining that an entity occurs within the target communication item;
• identifying, from the plurality of communication items, a set of related communication items that were timestamped within temporal proximity to the target communication item and that share at least a topic with the entity occurring within the target communication item;
• generating a contextual title for the target communication item based at least on the set of related communication items, the target communication item, and the entity;
• determining, from the contextual title and based on a sensitivity policy, a data instance representing data to be omitted from the contextual title;
• determining representative tokens replacing the data instance from the contextual title;
• generating, from the contextual title, a processed contextual title that comprises the representative tokens replacing the data instance from the contextual title;
• and
• assigning the processed contextual title to a new metadata field associated with the target communication item.