The inscriptions have a lot of importance in the history of India. But they have some limitations.
1. They have some technical limitations. Some of the letters are very dim or in a faded state. It is not easy to read them.
2. Some letters are completely erased or damaged somehow.
3. The real meaning of some inscriptions is difficult to arrive at in context.
4. Thousands of inscriptions have been found. They could not be read, translated or published.
5. There were many inscriptions that could not survive. Many might have been destroyed. Only a few among the written ones are available now.
6. Things we consider as important, like political and economic matters, are not recorded in the inscriptions.
For example, we do not find anything about the agricultural practices or the joys and sorrows of daily life.
7. They give preference to only serious and strange things.
8. In the inscriptions what we see is the interest of those who caused the inscriptions. So to know the reality, we must look at them with a critical mind.