As ID practitioners we look at problems very differently so if someone calls with a musculoskeletal complaint then you should be able to help. Think of your skill set in 3 different categories, not just manual therapy: 1) diagnosis 2) manual therapy/exercise 3) load management/proper referral
In regards to your specific case follow the general history taking video that was posted recently. Age and sex, then the 5 specific questions to get more information of the chronicity and severity. The patient’s age along with the other 5 questions will give you a really good prognosis right out of the gate.
As far as tests–run them through level 5 DF, PF, Lockout if needed. In addition, perform passive toe extension while lying supine. A healthy toe should move 90 degrees. A person with a bad first toe absolutely needs stellar DF and PF to save the joint.
After collecting all the data you should be able to narrow down how much you can help. If this patient is behind conservative care, they now have a complete diagnosis and know where to go next. Generally speaking, foot/ankle orthopedists have better skills than podiatrists if surgical consult is the next step.
This should get you started. Let us know if you have any further questions.