What should an effective altruist be committed to?

If I were to self-identify as an effective altruist, I might take myself merely to have committed to (*).

(*) To be a good altruist, you should use evidence and reason to do the most good with your altruistic actions.
Sometimes, however, effective altruism also seems to involve a second, potentially more demanding commitment. That is, it seems to involve a commitment about how much of my productive energy I should allocate to altruistic pursuits.
If effective altruism does and should involve a commitment of this kind, then its proponents should try to come up with a reasonable (acceptably inclusive, flexible, etc) statement of it. Neglecting to do so has several downsides. I’ll flag three:
1. It leaves effective altruism and the effective altruism community open to being misunderstood, particularly by outsiders. For example, one might think that effective altruism claims that:
(**) To be a good person, you should use evidence and reason to do the most good with all your actions.
This seems impossibly demanding. (Of course, a weaker and more carefully formulated version of (**) could be plausible and may enjoy widespread assent within the EA community at present.)
2. Vagueness on this topic seems to create fertile grounds for confusion, stress or even acrimony within the community.
3. Some people (e.g. me) will be reluctant to self-identify as an effective altruist due to uncertainty about what, if anything, such an identification entails beyond (*).
Disclosure: I’m a member of GWWC and I work for 80,000 Hours, but I don’t self-identify as an effective altruist.