Your ICP is not a filter. It's a paragraph.
Job title + company size + industry describes a market, not a customer. Here's the ICP format that actually converts.
Ask a founder for their ICP and you'll get four filters: 'CTOs at Series A SaaS companies in the US, 20-200 employees.' That's a market segment. It is not a customer.
A useful ICP explains why someone buys. 'A technical co-founder who was a first engineer, is now managing 8 people, and just realized they haven't shipped in six weeks because they're doing performance reviews.' That paragraph tells you what to say in the first line of a cold email.
The filter version tells you who to spam. The paragraph version tells you what pain to name. Only one of those gets replies.
When you write your ICP as prose, three things happen: your messaging gets sharper, your qualifier can actually disqualify bad-fit leads, and your team argues about the right thing (do we believe this pain exists?) instead of the wrong thing (should we filter for 20 or 50 employees?).